2020 flash card

A nonmetallic-sheathed cable, passing through a bored hole less than 1¼ in. from the edge of a wood framing member, must be protected by a steel plate (or bushing) at least ___ in. thick.

1/16

A 2-in. threaded RMC is terminating into a 2-in. sealing fitting. The minimum thickness of the sealing compound shall be ___ in.

2 inch 501.15(C)(3)

A one-family dwelling has a front entrance on the east side of the house, an attached garage with two 10-ft wide doors on the south side, and a back entrance door on the west side of the house.This one-family dwelling requires ___ lighting outlet(s) for these outdoor entrances.

2. A vehicle door in a garage is not considered an outdoor entrance or exit. Reference: 210.70(A)

Cable trays containing welding cables shall have a permanent sign attached to the cable tray at intervals not greater than ___ ft.

20 Reference: 630.42(C)

When calculating show-window lighting loads for a commercial service, a load of not less than ___ shall be included for each linear foot of show window, measured horizontally along its base.

220.43(a) 200va/linear foot

For track lighting in a church, a load of not less than ___ shall be included for every ___ ft of lighting track or fraction thereof.

220.43(b) 150-2

In each dwelling unit, the feeder load shall be computed at ___ volt-amperes for each 2-wire small-appliance branch circuit required by 210.11(C)(1).

220.52(a) 1500

It shall be permissible to apply a demand factor of ___% to the nameplate rating load of ___ or more appliances fastened in place rated ¼ hp or greater or 500 watts or greater, other than electric cooking equipment, clothes dryers, space-heating equipment, or air- conditioning equipment, that are served by the same feeder in a one-family dwelling.

220.53 75%-4

Where it is unlikely that two or more ___ loads will be in use simultaneously, it shall be permissible to use only the largest load(s) that will be used at one time in calculating the total load of a feeder or service.

220.60 noncoincident load

Service-drop conductors shall have a vertical clearance of not less than ___ ft above the roof surface.

230.24(a) 8

Residential 240-volt service-drop conductors must have a vertical clearance above a driveway of at least ___ ft.

230.24(b) 12

What is the minimum vertical clearance (in ft) for 208Y/120-volt, 3-phase overhead service conductors in a commercial area subject to minimal truck traffic

230.24(b)(4) 18ft

The point of attachment of the service-drop conductors to a building must not be less than ___ ft above finish grade.

230.26 10 feet

Circuit breakers rated ___ or less and 1000 volts or less shall have the ampere rating molded, stamped, etched, or similarly marked into their handles or escutcheon areas.

240.83(b) 100 amp

Every circuit breaker having an interrupting rating other than ___ amperes shall have its interrupting rating shown on the circuit breaker.

240.83(c) 5000

Where the service-entrance phase conductors are larger than 1100-kcmil copper or 1750-kcmil aluminum, the main bonding jumper shall have an area that is not less than ___ of the area of the largest phase conductor.

250.102(c)(1) 12 1/2

Where the ungrounded supply conductors are larger than 1100 kcmi copper, the main bonding jumper shall have an area not less than ___% of the area of the largest ungrounded supply conductor.

250.102(c)(1) note 1 12 1/2 %

Where installed on the outside of a raceway, the length of the equipment bonding jumper shall not exceed ___ ft and shall be routed with the raceway.

250.102(e)(2) 6 feet

The ___ conductor of each separately derived system shall be bonded to the nearest available point of the interior metal water piping system(s) in the area served by each separately derived system.

250.104(d)(1) Grounded

Where practicable, contact between dissimilar metals anywhere in the system shall be avoided to eliminate the possibility of ___.

342.14 Galvanic Action

Horizontal runs of IMC supported by openings through framing members at intervals not exceeding ___ ft and securely fastened within ___ ft of termination points shall be permitted.

342.30(b)(4) 10 feet 3 feet

All cut ends of rigid metal conduit (RMC) shall be reamed or otherwise finished to remove rough edges. Where conduit is threaded in the field, a standard cutting die with a ___ in. taper per foot shall be used.

344.28 3/4

Where approved, rigid metal conduit shall not be required to be securely fastened within ___ ft of the service head for above-the-roof termination of a mast

344.30(a)(3) 3

The minimum bending radius for integrated gas-spacer cable with an integral trade size 3-in. conduit is ___ in.

35

The maximum distance between supports for 4-in. PVC is ___ ft

352.30 7 feet

Type AC cable shall be supported and secured by staples; cable ties listed, and identified for securement and support; straps, hangers, or similar fittings; or other approved means at intervals not exceeding ___ ft.

4 1/2

On hermetic refrigerant motor compressors, the value of branch-circuit selection current will always be ___ the marked rated-load current. a)less than b)equal to c)greater than a) I only b) I or II c) II or III d) III only

440.4(c) c

All switches shall be installed such that the center of the grip of the operating handle of the switch, when in its highest position, is not more than ___ above the floor or working platform.

404.8(a) 6 ft 7 in

A nongrounding-type receptacle has been replaced with a new grounding-type duplex receptacle.The 15-ampere circuit breaker feeding the circuit has been replaced with a 15-ampere ground-fault circuit breaker.The new receptacle or its cover plate must be marked ___ and be visible after installation. "Two-Wire Circuit" "No Equipment Ground" "GFCI Protected"a) III only b) I and III only c) II and III only d) I, II, and III

406.4(2)(c) c)

Grounding-type receptacles shall be installed only on circuits of the ___ for which they are rated, except as provided in Tables 210.21(B)(2) and (B)(3). voltage class wattage currenta) I only b) I and III only c) I and II only d) I, II, and III

406.4(a) voltage class and current

A 480Y/277-volt switchboard, having exposed live parts on one side and a concrete wall on the other side, requires a minimum working space depth of ___ in.

42 (3½ ft = 42 in.) Reference: Table 110.26(A)(1)

The overall length of a mobile home power-supply cord, measured from the end of the cord, including bared leads, to the face of the attachment plug cap shall not be less than ___ ft and shall not exceed ___ ft.

550.10(d) 21ft/36 1/2ft

Type MI cable shall be supported securely at intervals not exceeding ___ ft by straps, staples, hangers, or similar fittings designed and installed so as not to damage the cable.

6 feet

Where the same 4 AWG conductor enters and then exits a wireway through conduit or tubing, the distance between those raceway entries shall not be less than ___ times the trade diameter of the larger raceway.

6 time 314.28(a)

The ampacity of the conductors from the generator output terminals to the first distribution device(s) containing overcurrent protection shall not be less than ___% of the nameplate current rating of the generator.

445.13 115%

Tapped conductors shall not be permitted for portable generators rated ___ or less where field wiring connection terminals are not accessible.

445.13 15 kw

Where field-installed wiring passes through an opening in an enclosure, conduit box, or barrier, a ___ shall be used to protect the conductors from the edges of an opening having sharp edges within generators

445.16 bushing

Every recreational vehicle site equipped with a ___ shall also be equipped with a 30-ampere, 125-volt receptacle.

50-ampere receptacle Reference: 551.71(C)

Where the motor-control circuit transformer rated primary current is less than 2 amperes, an overcurrent device rated or set at not more than ___ of the rated primary current shall be permitted in the primary circuit.

500% Reference: 430.72(C)(4)

Class I locations are those in which ___ are or may be present in the air in quantities sufficient to produce explosive or ignitible mixtures

500.5(b) Flammable gases, flammable liquid-produce vapor, or combustible liquid-produce vapor

In Category 1 (critical care) spaces, the equipment grounding conductor for special- purpose receptacles, such as the operation of mobile X-ray equipment, shall be extended to the ___ of branch circuits for all locations likely to be served from such receptacles.

517.19(h) reference grounding point

All branch circuits serving patient care spaces shall be provided with an effective ___ path by installation in a metal raceway system or a cable having a metallic armor or sheath assembly.

517.13(a) Ground fault current

The equipment-grounding terminal buses of the normal and essential branch-circuit panelboards serving the same individual patient care vicinity shall be connected together with an insulated continuous copper conductor not smaller than ___.

517.14 #10 awg

The line isolation monitor shall not alarm for a fault hazard of less than ___ mA or for a total hazard current of less than ___ mA.

517.160(b)(1) 3.7 ma-5ma

Each Category 2 (general care) space patient bed location shall be provided with a minimum of ___ receptacle(s).

517.18(b)(1) 8

Receptacles that are located within patient rooms, bathrooms, playrooms, and activity rooms of pediatric units or spaces with similar risk as determined by the health care facility's governing body by conducting a risk assessment, other than infant nurseries, shall be ___ or shall employ a ___ cover.

517.18(c) tamper resistance-tamper resistance

Each patient bed location in a Category 1 (critical care) space shall be supplied by at least ___ branch circuit(s).

517.19(a) two branch circui

Each patient bed location in a Category 1 (critical care) space shall be provided with a minimum of ___ receptacle(s).

517.19(b)(1) 14 receptacle

Each operating room shall be provided with a minimum of ___ receptacles.

517.19(c)(1) 36

In Category 1 (critical care) spaces, a patient care vicinity shall be permitted to have a patient equipment grounding point. An equipment-bonding jumper, not smaller than ___, shall be used to connect the grounding terminal of all grounding-type receptacles to the patient equipment grounding point.

517.19(d) 10 awg

Category ___ (critical care) space is space in which failure of equipment or a system is likely to cause major injury or death to patients or caregivers.

517.2 1

Category ___ (general care) space is space in which failure of equipment or a system is likely to cause minor injury to patients, staff, or visitors.

517.2 2

A patient care vicinity is defined as a space, within a location intended for the examination and treatment of patients, extending ___ ft beyond the normal location of the patient bed, chair, table, treadmill, or other device that supports the patient during examination and treatment and extending vertically to ___ ft above the floor.

517.2 6ft-7ft6in

A(n) ___ is any area of the health care facility that has been designated to be used for the administration of any flammable inhalation anesthetic agents in the normal course of examination or treatment.

517.2 Anesthetizing location

All exposed lamps in theater dressing or makeup areas including rooms, where they are less than ___ ft from the floor, shall be equipped with open-end guards riveted to the outlet box cover or otherwise sealed or locked in place.

520.72 8ft

A means to disconnect each portable structure from all ungrounded conductors shall be provided for each carnival ride.The disconnecting means shall be located within sight and within ___ ft of the operator's station.

525.21 6ft

Portable structures at carnivals shall be maintained not less than ___ ft in any direction from overhead conductors operating at 1000 volts or less, except for the conductors supplying the portable structure.

525.5(b)(1) 15ft

Stage cables for motion picture studio stage set lighting shall be protected by means of overcurrent devices set at not more than ___% of the ampacity given in the applicable tables of Articles 310 and 400.

530.18(a) 400%

Lamps in cellulose nitrate film storage vaults shall be installed in rigid luminaires of the ___ type.

53051 glass enclose and gasketed

Each motion picture projector, floodlight, spotlight, or similar equipment shall have clear working space not less than ___ in. wide on each side and at the rear thereof.

540.12 30in

Conductors supplying outlets for arc and xenon projectors of the professional type shall not be smaller than ___ and shall have an ampacity not less than the projector current rating.

540.13 8 awg

A professional-type projector is a type of projector using ___ film that has a minimum width of ___ in. and has on each edge ___ perforations per inch, or a type using carbon arc, xenon, or other light source equipment that develops hazardous gases, dust, or radiation.

540.2 35 or 70mm/5.4

A(n) ___ is any building that is of closed construction and is made or assembled in manufacturing facilities on or off the building site for installation, or assembly and installation on the building site, other than manufactured homes, mobile homes, park trailers, or recreational vehicles.

545.2 manufacture building

In closed construction of manufactured buildings, cables shall be permitted to be secured only at cabinets, boxes, or fittings where ___ or smaller conductors are used and protection against physical damage is provided.

545.4(b) 10 awg

Manufactured building service-entrance conductors shall be installed after erection at the building site unless the ___ is known prior to manufacture.

545.6 ex Point of attachment

All cables installed in agricultural buildings shall be secured within ___ in. of each cabinet, box, or fitting.

547.5 8 inch

Agricultural building luminaires shall be installed to minimize the entrance of ___.

547.8(a) dust,foreing matter,moisture and corrosive material

The power supply to the mobile home shall be a feeder assembly consisting of not more than one listed ___ -ampere mobile power-supply cord or a permanently installed feeder.

550.10 50 amp

Wires that are used as crane (or hoist) contact conductors shall be secured at the ends by means of approved strain insulators and shall be mounted on approved insulators so that the extreme limit of displacement of the wire does not bring the latter within less than ___ in. from the surface wired over.

610.21(b) 1 1/2

Crane, hoist, and monorail hoist motor branch circuits shall be protected by fuses or inverse-time circuit breakers that have a rating in accordance with ___.

610.42(a) table 430.52

Conductors supplying a fire pump motor(s), pressure maintenance pumps, and associated fire pump accessory equipment shall have a rating not less than ___ of the sum of the fire pump motor(s) and pressure maintenance motor(s) full-load current(s), and ___ of the associated fire pump accessory equipment.

695.6(b)(1) 125%/100%

The voltage at a fire pump controller's line terminals shall not drop more than ___ below normal (controller-rated voltage) under motor starting conditions.

695.7 15%

Separation of ground-fault protection time-current characteristics shall conform to the manufacturer's recommendations and shall consider all required tolerances and disconnect operating time to achieve ___ selectivity

708.52(d) 100%

___ is a single or multiconductor solid dielectric insulated cable rated 2001 volts up to and including 35,000 volts, nominal.

TYPE MV

A ___ is a type of surface, flush, or freestanding raceway designed to hold conductors and receptacles, assembled in the field or at the factory.

Definition Multi-outlet Assembly

Service conductors are the conductors from the service point to the ___.

Definition Art 100 Service Disconnect mean

A ___ is defined as that which is built or constructed, other than equipment.

Definition Article 100 Structure

A 15-ampere duplex receptacle installed in a television audience seating area can be supplied by a ___-ampere branch-circuit. 15 20 30a) II only b) I only c) either I or II d) I, II, or III

b) I only Reference: 520.9

A receptacle installed in an area designated for the installation of laundry equipment and where there are no other receptacles can be a: 15-ampere single receptacle. 15-ampere duplex receptacle. 20-ampere duplex receptacle.a) III only b) I or III c) II or III d) I, II, or III

c) II or III Reference: The laundry circuit must be a 20- ampere circuit [210.11(C)(2)]. A single receptacle cannot exceed the rating of the circuit [Article 100]. A duplex receptacle rated 15 amperes is permitted on a 20-ampere circuit [Table 210.21(B)(3)].

The discharge circuit of a 480-volt capacitor or 480-volt capacitor bank shall not be connected in which way(s)? Permanently connected to the terminals Automatic means of connecting it to the terminals Manual means of connecting the discharge circuita) I or II only b) I or III only c) III only d) I, II, or III

c) III only Reference: 460.6(B)

The ground-fault circuit interrupter shall be installed in a ___ location.

readily accessible (210.8)

Electrical installations in hollow spaces, vertical shafts, and ventilation or air-handling ducts shall be made so that the possible spread of fire or products of combustion will not be ___.

substantially increase

Power feed, grounding connection, and shield system connection between the FCC system and other wiring systems shall be accomplished in a(n) ___ identified for this use.

transition assembly

IMC encased in a concrete slab, on the first floor of an office building, is considered a ___ location.

wet location

When calculating the maximum number of conductors or cables permitted in a conduit or tubing, all of the same size (total cross-sectional area including insulation), the next-higher whole number shall be used to determine the maximum number of conductors permitted when the calculation results in a decimal greater than or equal to ___.

0.8

If a 1¼-in. EMT raceway containing three conductors is already filled to 20%, what is the raceway's cross-sectional area?

1.496 sq

A duplex receptacle rated 20 amperes can be installed on a ___ branch circuit. a) 15-ampere b) 20-ampere c) 15- or 20-ampere d) 20- or 25-ampere

210.21(b)(3) b)

In vertical raceways, 3/0 AWG aluminum conductors must be supported if the vertical rise is greater than ___ ft.

300.19(a) 180 feet

In damp or wet locations, surface-type enclosures (within the scope of Article 312) shall be so placed or equipped as to prevent moisture or water from entering and accumulating within the cabinet or cutout box and shall be mounted so there is at least ___ in. airspace between the enclosure and the wall or other supporting surface.

312.2 1/4

Covers of outlet boxes and conduit bodies having holes through which flexible cord pendants may pass shall be provided with approved ___ or shall have smooth, well-rounded surfaces on which the cord may bear.

314.42 bushings

For straight pulls, the length of the box shall not be less than ___ the outside diameter, over sheath, of the largest shielded conductor or cable entering the box on systems over 1000 volts, nominal.

314.71(a) 48 time

RMC, elbows, couplings, and fittings shall be permitted to be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where protected by ___ approved for the condition.

344.10(b) Corrosion Protection

The provision for a (future) grounded conductor is to complete a ___ for electronic lighting control devices.

circuit path

Type UF cable, buried underground, fed from a 15-ampere, ground-fault circuit interrupter at a one-family dwelling must have a minimum cover of ___

12 inch

Receptacles located more than ___ ft above the floor are not counted in the required number of receptacles along the wall.

210.52 (4) 5 1/2

Where raceways contain ___ or larger insulated circuit conductors, and these conductors enter a cabinet, a box, an enclosure, or a raceway, the conductors shall be protected by an identified fitting providing a smoothly rounded insulating surface, unless the conductors are separated from the fitting or raceway by identified insulating materials that are securely fastened in place.

300.4(G) 4 awg

As a general rule, ___ and larger conductors shall be permitted to be connected in parallel (electrically joined at both ends)

310.10(G)(1) 1/0

Where the distance above the roof to the bottom of the raceway is less than 7/8 in., a temperature adder of ___ °F) shall be added to the outdoor temperature to determine the applicable ambient temperature for application of the correction factors in Table 310.15(B)(1) or Table 310.15(B)(2).

310.15(b)(2) 60 F

Where installed in raceways, conductors ___ and larger, not specifically permitted or required elsewhere in the NEC to be solid, shall be stranded

310.3(c) 8 awg

Approved drainage openings not smaller than ___ and not larger than ___ in diameter shall be permitted to be installed in the field in boxes or conduit bodies listed for use in damp or wet locations.

314.15 1/8-1/4

How many 14 AWG THW conductors are permitted in a 3 in. × 2 in. × 2½ in. device box?

314.16(A) 6 conductors

What is the maximum number of 12 AWG THW conductors permitted in a 4-in. octagon box that is 1½ in. deep? (The box contains a fixture stud and a hickey.)

314.16(a) 4

Where nonmetallic boxes are used with open wiring or concealed knob-and-tube wiring, the conductors must enter the box through ___.

314.17 (b)(1) individual hole

Nonmetallic boxes shall be suitable for the lowest ___ conductor entering the box.

314.17(b)(4) temperature rated conductor

Outlet boxes that do not enclose devices or utilization equipment shall have a minimum internal depth of ___ in.

314.24(a) 1/2

Where permanent barriers are installed in a junction box, each section shall be considered as a(n) ___.

314.28(3)(d) separated box

What are the minimum dimensions for "X" and "Y" in the drawing below?

314.28(a)(1)(2) 24x18

In pull boxes or junction boxes having any dimension over ___ in., all conductors shall be cabled or racked up in an approved manner. a) 6 b) 12 c) 36 d) 72

314.28(b) 72 in

Boxes and conduit bodies in buildings shall be installed so the contained wiring can be ___ without removing any part of the building or structure.

314.29 (a) accessed

The minimum thickness in inches for a steel box measuring 6 in. × 4 in. × 3½ in. is ___ in.

314.40(b) 0.0625 in.

Connections from headers to cabinets and other enclosures, in cellular concrete floor raceways, shall be made by means of: listed metal raceways. listed nonmetallic raceways. listed fittings.a) I only b) I and II only c) I and III only d) I, II, and III

372.18(b) C

Conductors shall be arranged so the power distribution block terminals are ___ following installation.

376.56 Unobstructed

Luminaires weighing no more than ___ pounds can be supported by boxes (such as device boxes) not specifically designed to support luminaires, provided the luminaire, or its supporting yoke, is secured to the box with at least two No. 6 or larger screws.

6 pound 314.27(A)(1) Exception

Where run across the top of floor joists or within ___ ft of the floor or floor joists across the face of rafters or studding, in an attic that has permanent stairs, nonmetallic-sheathed cable must be protected by substantial guard strips that are at least as high as the cable.

7 feet

Type MC cable must be supported (and secured) at intervals not exceeding ___ in. a) 4½ b) 6 c) 54 d) 72

72 inch

A(n) ___ is a compartment or chamber to which one or more air ducts are connected and that forms part of the air distribution system.

Plenum space

applies to spaces ___________________ purposes but used for air-handling purposes as a plenum. This section shall not apply to habitable rooms or areas of buildings, the prime purpose of which is not air handling.

not specifically fabricated for environmental air-handling 300.22(c)

Where exposed to the weather, raceways shall be: a) rainproof and arranged to drain. b) watertight and arranged to drain. c) weatherproof and arranged to drain. d) listed or approved for use in wet locations and arranged to drain.

(d) 230.53

Cables installed parallel to framing members (studs, joists, etc.) or installed parallel to furring strips shall be installed and supported so that the nearest outside surface of the cable is at least from the nearest edge of the framing member or furring strip where nails (or screws) are likely to penetrate »300.4(D)«.

1 1/4 inch 300.4 (d)

Unused openings, other than those intended for the operation of equipment, those intended for mounting purposes, or those permitted as part of the design for listed equipment, shall be closed to afford protection ___ to the wall of the equipment.

110.12 substantially equivalent

Type UF cable, buried under a one-family dwelling driveway, must have a minimum cover of ___ in.

18 inch

In FCC systems, general-purpose and appliance branch circuits have a maximum current rating of ___ amperes, while individual branch circuits have a maximum current rating of ___ amperes.

20 and 30 amp

Expansion fittings and telescoping sections of metal raceways shall be made electrically continuous by ___ or other means.

250.98 Equipment bonding Jumper

The continuity of a grounded conductor shall not be dependent on the device in ___. a) branch circuits not having a grounded conductor b) multiwire branch circuits c) individual branch circuits d) branch circuits

300.13 (b) b)

Where conductors carrying alternating current are installed in ferrous metal raceways, they shall be so arranged as to avoid heating the surrounding metal by ___.

300.20(a) Induction

In both exposed and concealed locations, where a cable or raceway-type wiring method is installed through bored holes in joist, rafters, or wood members, holes shall be bored so that the edge of the hole is not less than ___ in. from the nearest edge of the wood member.

300.4(2)(d) 1 1/4

___ is a factory assembly of one or more conductors insulated with a highly compressed refractory mineral insulation and enclosed in a liquidtight and gastight continuous copper or alloy steel sheath.

MI CABLE

For concealed work in finished buildings or finished panels for prefabricated buildings, where such support is impracticable, cables can be fished between access points »300.4(D) Exception No. 2«.

cable can be fished between point 300.4(d) Exception #2

The overall covering of Type UF cable shall be ___. flame retardant suitable for direct burial in the earth moisture-, fungus-, and corrosion-resistanta) II only b) I and II only c) II and III only d) I, II, and III

d)I,II, and III

Electrical installation openings that penetrate into or through fire-resistant-rated structures (walls, partitions, floors, ceilings, etc.) must be_________using approved methods that maintain the fire-resistance rating

firestoppet 300.21

An electrician needs to install a surface-mounted, nonmetallic, weatherproof cabinet on the outside of a concrete block building. Since the cabinet must be mounted in a wet location, it must be mounted so there is at least ___ in. of airspace between the cabinet and the wall

312.2 exception (none)

Installations within or behind a surface of concrete, tile, gypsum, plaster, or other non-combustible material, including boxes employing a flush-type cover or faceplate, shall be made so that the front edge of the box, plaster ring, extension ring, or listed extender will not be set back of the finished surface more than ___ in.

314.20 1/4

A means must be provided in each metal box for the connection of a(n) ___.

314.40(d) equipment grounding conductor

A 2½-in. the rigid metal conduit enters the back of a pull box with a removable cover on the opposite side. The raceway encloses four 4/0 AWG THHN copper conductors and one 4 AWG equipment grounding conductor. The minimum depth (distance from the entry wall to the cover) for this pull box is ___ in.

4 inch 314.28(A)(2) Exception and Table 312.6(A)

What is the maximum ampacity for a 3 AWG THHN copper conductor where the temperature termination on one end is rated 75˚C and the rating of the temperature termination on the other end is unknown? The ambient temperature will not exceed 30˚C and there will be three current-carrying conductors in the raceway. Also, this installation will not exceed voltage drop recommendations.

85 amp 310.16

The ___ for the controlled lighting circuit shall be installed at the location where switches control lighting loads that are supplied by a grounded general-purpose branch circuit serving bathrooms, hallways, stairways, and habitable rooms or occupiable spaces as defined in the applicable building code.

Grounded circuit conductor

Type FCC cable shall be clearly and durably marked on both sides at intervals of not more than 24 in. with the information required by 310.8(A) and with what additional information? Material of conductors and ampacity Rated frequency and number of phases Maximum temperature rating) I only b) I and II only c) I and III only d) I, II, and III

I And III

Multioutlet assemblies shall not: i.be installed in hoistways. ii.run within dry partitions. iii.run through dry partitions.

be installed in hoistways and run through dry partitions

A ___ shall be defined as a transverse raceway for electric conductors, providing access to predetermined cells of a cellular metal floor, thereby permitting the installation of electric conductors from a distribution center to the cells.

cellular Metal floor raceway Header

Type MI cable without an overall nonmetallic covering, Type MC cable without an overall nonmetallic covering, Type AC cable, or other factory-assembled multiconductor cables (control or power) listed _____________________________, or listed prefabricated cable assemblies of metallic manufactured wiring systems without nonmetallic sheath shall be permitted to be installed in these spaces. All other types of cables and conductors must be installed in one of the raceways (or wireways)

specifically for the use within an air-handling space 300.22(c)(1)

In both exposed and concealed locations, where a cable or raceway-type wiring method is installed through bored holes in joists, rafters, or wood members, holes shall be bored so that the edge of the hole is not less than ___ in. from the nearest edge of the wood member.

1 1/4

Service conductors will be connected in parallel and installed in two separate raceways. The ungrounded supply conductors in each of the two raceways will be 250-kcmil copper. A single supply-side bonding jumper will be installed to bond the two raceways. What minimum size copper conductor is required?

1/0 (250 kcmil + 250 kcmil = 500 kcmil. The size supply-side bonding jumper required for a 500 kcmil copper conductor is 1/0

A branch circuit that supplies two or more receptacles or outlets for lighting and appliances is a(n) ___ branch circuit.

100 Def Branch Circuit General Purpose

The definition of a branch circuit is ___. a) the circuit conductors between the service and the subpanel b) the circuit conductors prior to the final overcurrent device protecting the circuit c) the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s) d) the circuit conductors between the final overload device protecting the circuit and the outlet(s)

100 Def c)

Combustible dust is defined as dust particles that are ___ microns or smaller (i.e., material passing a U.S. No. 35 Standard Sieve as defined in ASTM E11-2015, Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves) and present a fire or explosion hazard when dispersed and ignited in air.

100 def 500

___ is defined as equipment enclosed in a manner that will exclude dusts and does not permit arcs, sparks, or heat otherwise generated or liberated inside of the enclosure to cause ignition of exterior accumulations or atmospheric suspensions of a specified dust on or in the vicinity of the enclosure.

100 def Dust-Ignition Proof

Systems of illumination utilizing fluorescent lamps, high-intensity discharge (HID) lamps, or neon tubing are defined as ___.

100 def Electric-discharge lighting

A branch circuit that supplies only one utilization equipment is known as a(n) ___ branch circuit.

100 def Individual branch circuit

A(n) ___ is an electrical source, other than a service, having no direct connection(s) to circuit conductors of any other electrical source other than those established by grounding and bonding connections.

100 def Separately derived system

A(n) ___ enclosure is constructed so that dust will not enter under specified test conditions.

100 def dusttight

Covered, shielded, fenced, enclosed, or otherwise protected by means of suitable covers, casings, barriers, rails, screens, mats, or platforms to remove the likelihood of approach or contact by persons or objects to a point of danger is the definition of ___.

100 def guarded

___ are generally accessible from the rear as well as from the front and are not intended to be installed in cabinets.

100 def switchboards

The term ___ is defined as a complete lighting unit consisting of a light source such as a lamp(s), together with the parts designed to position the light source and connect it to the power supply.

100 definition Luminaire

A single receptacle installed on an individual branch circuit shall have an ampere rating not less than ___% of the rating of the branch circuit.

100% Reference: 210.21(B)(1)

Internal parts of electrical equipment, including busbars, wiring terminals, insulators, and other surfaces, shall not be ___ by foreign materials such as paint, plaster, cleaners, abrasives, or corrosive residues.

110.12(b) Damage or contaminated

On a switchboard, switchgear, or panelboard supplied from a 4-wire, delta-connected system where the midpoint of one phase winding is grounded, that phase busbar or conductor having the higher voltage to ground shall be durably and permanently marked by an outer finish that is ___ in color or by other effective means.

110.15 Orange

In other than dwelling units, a permanent arc flash hazard warning label shall be field or factory applied to service equipment rated ___ or more.

110.21(b) 1200

Where equipment operating at 1000 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance while energized is required by installation instructions or function is located in a crawl space limited access, there shall be an accessible opening not smaller than ___ in. × ___ in.

110.26(4)(1) 22 in x 30 in

The width of the working space in front of electric equipment operating at 1000 volts, nominal, or less to ground shall be the width of the equipment or ___ in., whichever is greater.

110.26(a) 30 in

The minimum depth of working space for a 120/240-volt panelboard, with exposed live parts on one side and grounded parts on the other, shall be at least ___ ft.

110.26(a)(1) condition 2 3 feet

Where rear access is required to work on nonelectrical parts on the back of enclosed equipment, a minimum horizontal working space of ___ in. shall be provided.

110.26(a)(1)(a) 30 in

The width of the working space in front of the electric equipment shall be the width of the equipment or ___ in., whichever is greater.

110.26(a)(2) 30 in

The minimum height for work space about service equipment, switchboards, switchgear, panelboards, or motor control centers shall be ___ ft.

110.26(a)(3) 6 1/2 ft

Other equipment that is associated with the electrical installation and is located above or below the electrical equipment shall be permitted to extend not more than ___ in. beyond the front of the electrical equipment.

110.26(a)(3) 6 in

The minimum height of working space for equipment operating at 1000 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance while energized shall be ___ ft or the height of the equipment, whichever is greate

110.26(a)(b) 6 1/2 feet

Other equipment or support structures, such as concrete pads, associated with the electrical installation located above or below the electrical installation shall be permitted to extend not more than ___ beyond the front of the electrical equipment. a) 0 in. b) 6 in. c) 12 in. d) 24 in.

110.26(a)(b) b

Where electrical equipment rated ___ amperes or more that contains overcurrent devices, switching devices, or control devices is installed and there is a personnel door(s) intended for entrance to and egress from the working space less than ___ ft from the nearest edge of the working space, the door(s) shall open in the direction of egress and be equipped with listed panic hardware or listed fire exit hardware.

110.26(c)(3) 800 amp/25ft

The space equal to the width and depth of switchboards, switchgear, panelboards, and motor control centers and extending from the floor to a height of ___ ft above the equipment or to the structural ceiling, whichever is lower, shall be dedicated to the electrical installation.

110.26(e)(1)(a) 6 ft

The maximum ampacity of a 500-kcmil, integrated gas-spacer cable (Type IGS) is ___ amperes.

168 table (326.80)

Each recreational vehicle site electrical service shall be calculated on the basis of not less than ___ volt-amperes per site equipped with 50-ampere, 208Y/120-volt, or 120/240-volt supply facilities; and ___ volt-amperes per site equipped with only 20-ampere supply facilities that are not dedicated to tent sites.

12,000, 2400 Reference: 551.73(A)

Nonmetallic-sheathed cable must be secured within ___ in. from a two-gang plastic device box mounted in a wall.

12inch (334.30)

What is the maximum distance (in ft) between supports for a straight run of 2-in. IMC made up with threaded couplings?

16 feet table 344.30 (b)(2)

In a commercial storage garage, duplex receptacle outlets shall be computed at not less than ___.

180 VA

For equipment rated 1200 amperes or more and over 6 ft wide that contains overcurrent devices, switching devices, or control devices, there shall be ___ entrance(s).

2 (or one entrance at each end of the working space) Reference: 110.26(C)

The service supplying power to a small industrial facility will consist of four disconnect switches.The disconnect switches will be separate enclosures with a main service disconnecting means in each enclosure. Each disconnect switch will be rated 225 amperes and the ungrounded service conductors supplying power to each disconnect switch will be 4/0 copper. A common grounding electrode conductor will be installed and a grounding electrode conductor tap will be installed from each disconnect switch to the common grounding electrode conductor.What size grounding electrode conductor tap is required from each disconnect switch to the common grounding electrode conductor?

2 AWG Reference: 250.64(D)(1)

A branch circuit providing power to a bathroom receptacle may also provide power to: two other receptacles, two luminaires, and an exhaust fan in the same bathroom. two other receptacles in the same bathroom and receptacles in two additional bathrooms. one luminaire in the same bathroom and one luminaire in another bathroom. a) I only b) I or II only c) II or III only d) I, II, or III

210.11(c)(3) b

In dwelling units, arc-fault circuit-interrupter protection shall not be required for 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets or devices installed in ___.

210.12(a) bathroom

Tap conductors for household cooking equipment supplied from a 50-ampere branch circuit shall have an ampacity of not less than ___ amperes.

210.19(a)(3) 20 amp

Where connected to a branch circuit having a rating in excess of ___, lampholders shall be of the heavy-duty type.

210.21(a) 20 amp

A duplex receptacle rated 15 amperes can be installed on a ___ ampere general-purpose branch circuit.

210.21(b)(3) 15 or 20

A 15-ampere rated duplex receptacle may be installed on a ___ branch circuit. a) 15-ampere b) 20-ampere c) 15- or 20-ampere d) 15-, 20-, or 25-ampere

210.21(b)(3) c

The rating of a single cord- and plug-connected utilization equipment shall not exceed ___% of the branch-circuit ampere rating.

210.23(a)(1) 80%

The total rating of utilization equipment fastened in place, other than luminaires, shall not exceed ___% of the branch-circuit ampere rating where lighting units, cord- and plug-connected utilization equipment not fastened in place, or both, are also supplied.

210.23(a)(2) 50%

Which of the following is not a standard classification for a branch circuit supplying several loads? a) 20 amperes b) 25 amperes c) 30 amperes d) 50 amperes

210.24 (b)

In dwelling units, a duplex receptacle fed from a multiwire branch circuit must have ___ as a means of disconnect. two single-pole circuit breakers without identified handle ties one double-pole circuit breaker two single-pole circuit breakers with identified handle tiesa) I only b) I or II only c) II only d) II or III only

210.4(b) d

Appliance receptacle outlets installed for specific appliances, such as laundry equipment, shall be placed within ___ ft of the intended location of the appliance.

210.50(c) 6

The maximum distance between receptacles in a one-family dwelling is ___ ft.

210.52 (a)(1) 12 feet

At least one GFCI-protected receptacle shall be located within ___ ft from the outside edge of each bathroom sink.

210.52(3)(d) 3

Receptacle outlets in or on floors shall not be counted as part of the required number of receptacle outlets unless located within ___ in. of the wall.

210.52(a)(3) 18in

A refrigerator receptacle can be fed from a: 15-ampere individual branch circuit. 20-ampere individual branch circuit. 20-ampere small appliance branch circuit. a) II only b) III only c) II or III d) I, II, or III

210.52(b)(1) ex 1 and 2 d)

The maximum distance between kitchen countertop receptacles is ___ ft.

210.52(c)(1) 4

What is the minimum number of 20-ampere small-appliance branch circuits required for a kitchen with 27 linear feet of countertop and an island that measures 2 ft by 6 ft?

210.52(c)(2) 2

Receptacles are permitted under an overhanging countertop, but are not counted as required countertop receptacles, where the countertop extends more than ___ in. beyond its support base.

210.52(c)(3)(3) 6

In addition to the number of branch circuits required by other parts of Article 210, at least one 120-volt, ___ ampere branch circuit shall be installed to supply receptacle outlets in attached garages and in detached garages with electric power.

210.52(c)(4) 20 amp

For a one-family dwelling that is at grade level, at least one receptacle outlet readily accessible from grade and not more than ___ ft above grade level shall be installed at the front and back of the dwelling.

210.52(e)(1) 6 1/2 ft

In a dwelling unit, a hallway measuring 21½ ft in length requires a minimum of ___ receptacle outlet(s).

210.52(h) 1

At least ___ receptacle outlet(s) shall be readily accessible in hotel and motel guest rooms.

210.60(b) 2

At least one 125-volt, single-phase, 15- or 20-ampere-rated receptacle outlet shall be installed within 18 in. of the top of a show window for each ___ linear foot or major fraction thereof of show-window area measured horizontally at its maximum width.

210.62 12 linear ft

A 125-volt, single-phase, 15- or 20-ampere rated receptacle outlet shall be installed at an accessible location within ___ ft of heating, air-conditioning, and refrigeration equipment.

210.63 25

At least one 125-volt, single-phase, 15- or 20-ampere-rated receptacle outlet shall be installed in an accessible location within ___ ft of the indoor electrical service equipment in a commercial building.

210.63 25ft

A meeting room with any floor dimension that is at least ___ ft or greater in any direction and that has a floor area of at least 215 ft2 (20 m2) shall have at least one floor receptacle outlet, or at least one floor outlet to serve receptacle(s), located at a distance not less than ___ ft from any fixed wall for each 215 ft2 (20 m2) or major portion of floor space.

210.65(b)(2) 12ft/6ft

A single receptacle rated 50 amperes can be installed on a ___ -ampere individual branch circuit.

210.70(2)(1) 40 amp and 50 amp

Switch-controlled receptacles (in lieu of a lighting outlet) are permitted in all but which of the following? a) Bedroom b) Library c) Dining room d) Hallway

210.70(2)(1) d)

Interior stairway lighting outlets shall be controlled by a wall switch at each floor level, where the difference between levels is ___ steps or more.

210.70(a)(2)(3) 6

A 20-amp, 125-volt receptacle installed within ___ ft from the top inside edge of the bowl of the sink shall have ground-fault circuit-interrupter protection for personnel.

210.8 (a)(7) 6

In accordance with the National Electrical Code, what is the minimum number of receptacles required in a bathroom located in an office occupancy? This bathroom will have two sinks. There will be a mirror on the wall behind the sinks and the owner does not want the mirror cut.

210.8(b) 0

What is the minimum number of 15-ampere branch circuits required for a one-family dwelling with an area of 1,800 ft2? The voltage at this dwelling will be 240/120 volts, single-phase.

220.12 (j) 3 ckt

An outlet supplying recessed luminaire(s) shall be calculated based on ___.

220.14(d) maximum volt-amp

The load for the required sign branch circuit shall be calculated at a minimum of ___.

220.14(f) 1200va

What is the maximum number of duplex receptacles rated 15-amperes that can be installed on a 20-ampere circuit?

220.14(i) 13

A single piece of equipment consisting of a multiple receptacle comprising four or more receptacles shall be computed at not less than ___ per receptacle.

220.14(i) 90 va

For circuits supplying loads consisting of motor-operated utilization equipment that is fastened in place and that has a motor larger than ⅛ hp in combination with other loads, the total calculated load shall be based on ___.

220.18(a) the total calculated load

For circuits supplying lighting units that have ballasts, transformers, autotransformers, or LED drivers, the calculated load shall be based on ___.

220.18(b) total ampere rating

In calculating the load of lighting units that employ an autotransformer, the load shall be based on ___.

220.18(b) total ampere rating

A homeowner wants to add twelve general-purpose receptacle outlets to the electrical drawings before the house is built. What additional load, in volt-amperes, will they add to the service-load calculation?

220.42 Adding General Lighting load

When calculating track lighting loads for a commercial service, an additional load of ___ volt-amperes shall be included for every ___ ft of lighting track or fraction thereof.

220.43 150 volt-2ft

Service-entrance cables shall be supported by straps or other approved means within ___ of every service head, gooseneck, or connection to a raceway or enclosure. a) 1 ft b) 6 ft c) 12 ft d) 30 ft

230.51(a) a

Service heads on raceways or service-entrance cables and ___ in service-entrance cables shall be located above the point of attachment of the service-drop or overhead service conductors to the building or other structure.

230.54(c) goosenecks

Energized parts of service equipment that are not enclosed shall be installed on a ___ and guarded in accordance with 110.18 and 110.27. switchboard panelboard control boarda) II only b) I or II only c) II or III only d) I, II, or III

230.62(b) d

Conductors other than service conductors shall not be installed in the same ___ in which the service conductors are installed.

230.7 Service raceway or Service cable

A service disconnect installed in a one-family dwelling unit as a service disconnect and also as the emergency disconnect shall be marked ___.

230.85(1) Service Disconnect& Emergency Disconnect

Service conductors run above the top level of a window shall be: a) 8 ft above a window. b) accessible. c) 3 ft above a window. d) considered out of reach.

230.9(a) Ex d

Ground-fault protection of equipment shall be provided for solidly grounded wye electric services of more than 150 volts to ground, but not exceeding 1000 volts phase-to-phase for each service disconnect rated ___ or more.

230.95 1000 amp

Type AC cable shall be permitted to be unsupported where the cable is not more than ___ in. in length at terminals where flexibility is necessary. a) 2 b) 6 c) 24 d) 72

24 inch

Supplementary overcurrent devices shall not be required to be ___.

240.10 Readily Accessible

Tap conductors longer than 25 ft will be installed in a high-bay manufacturing building. The tap shall be made no less than ___ ft from the floor.

240.21(b)(4)(9) 30 ft

Overcurrent devices shall not be located in the vicinity of easily ignitible material such as in ___.

240.24(2)(d) clothes closets

Where the overcurrent device is rated over ___ amperes, the ampacity of the conductors it protects shall be equal to or greater than the rating of the overcurrent device as defined in 240.6.

240.4(c) 800 amp

Plug fuses of 15-ampere and lower rating shall be identified by a(n) ___ configuration of the window, cap, or other prominent part to distinguish them from fuses of higher ampere ratings.

240.50(c) Hexagonal

Plug fuses of the Edison-base type shall be classified at not over 125 volts and ___ amperes and below.

240.51(a) 30 amp

Which of the following is not a standard ampere rating for fuses? a) 25 amperes b) 50 amperes c) 75 amperes d) 601 amperes

240.6(a) c

Circuit breakers shall be marked with their ampere rating in a manner that will be ___ after installation.

240.83(a) durable and visible

Where an equipment bonding jumper is installed on the outside of a raceway, the length shall not exceed ___ ft and shall be routed with the raceway or enclosure.

250.102(2) 6 feet

The supply-side bonding jumper shall not be smaller than the sizes shown in Table ___ for grounding electrode conductors.

250.102(c)(1)

Feeder conductors will be connected in parallel and installed in two separate raceways. The ungrounded feeder conductors in each of the two raceways will be 500-kcmil copper. The overcurrent device protecting these feeder conductors will be an 800-ampere circuit breaker. Wire-type equipment grounding conductor will be installed in each of the two raceways.What minimum size copper equipment grounding conductor will be required in each raceway?

250.122 1/0

In nonmetallic-sheathed cable, the equipment grounding conductor for 15-, 20-, and 30-ampere branch circuits ___. a) is required only with aluminum or copper-clad aluminum cable b) must be the same size as the insulated circuit conductors c) may be one size smaller than the insulated circuit conductors d) may be two sizes smaller than the insulated circuit conductors

250.122 b)

What size copper equipment bonding jumper is required for a 200-ampere panelboard located on the load side of the overcurrent device? (The conductors feeding the panel- board are 3/0 AWG copper conductors.)

250.122 table 6 awg

Which of the following is not a true statement concerning an equipment grounding conductor? a) Under certain conditions, equipment grounding conductors shall be required to be larger than circuit conductors supplying the equipment. b) One equipment grounding conductor may serve multiple circuits. c) Under certain conditions, equipment grounding conductors may be run in parallel. d) The size of equipment grounding conductors shall be increased where ungrounded conductors are increased in size.

250.122(a) a

A grounding connection must not be connected to ___ of equipment or to equipment grounding conductor(s) or be reconnected to ground on the load side of the service disconnecting means except as otherwise allowed in Article 250.

250.24(a)(a) normally non current carrying metal parts

An alternate ac power source such as an on-site generator is not a separately derived system if the ___ is solidly interconnected to a service-supplied system ___.

250.30 informational note 1 grounded conductor/grounded conductor

A separately derived system's grounding electrode conductor connection can be made at any point from the source to the ___ system disconnecting means or overcurrent device.

250.30(a)(1) first

A grounding ring encircling the building, in direct contact with the earth, must consist of at least ___ ft of bare copper conductor not smaller than 2 AWG.

250.52(a)(4) 20

Each plate electrode shall expose not less than ___ ft2 of surface to exterior soil and shall be installed not less than ___ ft below the surface of the earth.

250.52(a)(7)/250.53 (a)(5) 0.186ft2 ---2 1/2 feet

Where more than one grounding electrode is used, each electrode of one grounding system (including that used for strike termination devices) shall not be less than ___ ft from any other electrode of another grounding system.

250.53 (b) 6 feet

If a single rod, pipe, or plate grounding electrode has a resistance to earth of ___ or less, a supplemental grounding electrode shall not be required.

250.53(a)(2) Ex 25 ohm

If multiple rod, pipe, or plate electrodes are installed to meet the installation requirements of the grounding electrode system, they shall not be less than ___ ft apart.

250.53(a)(3) 6 feet

The grounding of electric systems, circuit conductors, surge arresters, surge-protective devices, and conductive normally non-current-carrying materials (and equipment) must be installed and arranged in a manner that prevents ___.

250.6(a) Objectionable Current

Bonding jumpers meeting the other requirements of this article shall be used around impaired connections, such as reducing washers or oversized ___ knockouts

250.92(b) concentric & eccentric

An intersystem bonding termination shall consist of a set of terminals with the capacity for connection of not less than ___ intersystem bonding conductors.

250.94(a)(2) 3

The full-load current of a 25-hp synchronous, 460-volt, 3-phase motor at unity power factor is ___.

26 amperes Reference: Table 430.250

For dwelling units, attached garages, and detached garages with electric power, at least one lighting outlet controlled by a ___ shall be installed to provide illumination on the exterior side of outdoor entrances or exits with grade-level access.

270.70(2)(2) listed wall mounted control device

All cut ends of conduits shall be reamed or otherwise finished to remove rough edges. Where conduit is threaded in the field, a standard cutting die with a ___ -in. taper per ft (1 in 16) shall be used.

3/4 344.28

At least ___ in. of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath, shall be left at each outlet, junction, and switch point for splices or the connection of luminaires or devices

300.14 6 in

At least ___ in. of free conductor (measured from the point in the conduit body where it emerges from its raceway or cable sheath) shall be left at each outlet, junction, and switch point.

300.14 6 inch

Conductors of circuits rated 1000 volts, nominal, or less, ac circuits, and dc circuits shall be permitted to occupy the same enclosure if: a) all conductors within the enclosure have an insulation rating equal to at least 1000 volts. b) all conductors operating at different voltage levels within the enclosure are separated by a permanent barrier. c) all conductors have an insulation rating equal to at least the maximum circuit voltage applied to any conductor within the enclosure. d) each conductor has an insulation rating equal to at least the maximum circuit voltage applied to each individual conductor within the enclosure.

300.3(c)(1) c

A dwelling has a 175-ampere service that is fed with THW copper conductors.The service is supplied by a single-phase, 120/240-volt system.What is the minimum size copper grounding electrode conductor?

310.12/310.16/250.16 6 awg

In damp or wet locations, surface-type cabinets, cutout boxes, and meter socket enclosures shall be so placed or equipped as to prevent moisture or water from entering and accumulating within them, and mounted so there is at least ___ in. airspace between the enclosure and the wall or other supporting surface.

312.2 1/4 in

A luminaire that weighs more than ___ pounds shall be supported independently of the outlet box, unless the outlet box is listed and marked on the interior of the box to indicate the maximum weight the box shall be permitted to support.

314.27(a)(2) 50 pound

Outlet boxes or outlet box systems used as the sole support of a ceiling-suspended (paddle) fan shall be listed, shall be marked by their manufacturer as suitable for this purpose, and shall not support ceiling-suspended (paddle) fans that weigh more than ___ pounds

314.27(c) 70 pounds

ENT shall be secured at least every ___ ft.

362.30(A) 3 Feet

Busways shall be permitted to be extended vertically through dry floors if totally enclosed (unventilated) where passing through and for a minimum distance of ___ ft above the floor to provide adequate protection from physical damage.

368.10(c)(2)(a) 6 ft

In other than industrial establishments, where a vertical riser penetrates two or more dry floors, a minimum ___ in.-high curb shall be installed around all floor openings for riser busways to prevent liquids from entering the opening.

368.10(c)(2)(b) 4 in

For industrial establishments only, omission of overcurrent protection shall be permitted at points where busways are reduced in ampacity, provided that the length of the busway having the smaller ampacity does not exceed ___ ft and has an ampacity at least equal to one-third the rating or setting of the overcurrent device next back on the line, and provided that such busway is free from contact with combustible material.

368.17(b) ex 50 ft

Busways shall be securely supported at intervals not exceeding ___ ft unless otherwise designed and marked.

368.30 5ft

The sum of cross-sectional areas of all contained conductors and cables at any cross section of a wireway shall not exceed ___ fill.

376.22(a) 20%

When an outlet from an underfloor raceway is discontinued, the sections of circuit conductors supplying the outlet: a) shall be permitted to be spliced. b) shall be removed from the raceway. c) shall be permitted to be reinsulated. d) shall be handled like abandoned outlets on loop wiring.

390.57 (b)

Cable tray systems shall not be used in ___ or where subject to severe physical damage. hoistways hazardous locations corrosive areasa) I only b) I and II only c) I and III only d) I, II, and III

392.12 a

Cable trays shall be permitted to extend ___ through partitions and walls, or ___ through platforms and floors in wet or dry locations where the installations, complete with installed cables, are made in accordance with the requirements of 300.21.

392.18(d) transversely/vertically

Steel cable trays shall not be used as equipment grounding conductors for circuits with ground-fault protection above ___.

392.60(b)notes 600 amp

Flexible metal conduit shall be permitted, in lengths not to exceed ________, to connect physically adjustable equipment and devices permitted to be in these fabricated ducts »300.22(B)«.

4 feet 300.22 (b)

What is the general lighting load (in volt-amperes) for a store with a floor area of 2,105 ft2? The lighting in this store will be energized for more than 3 hours every day.

4,000 volt-amperes The unit load per square foot for a retail occupancy is 1.9. 2,105 × 1.9 = 3,999.5 = 4,000 Do not multiply this number by 125 percent. Reference: Table 220.12 and the Note under the table

A switch rated for 20 amps will be installed in a device box beside a switch rated for 15 amps. Two 12 AWG THHN copper conductors will be terminated onto the switch rated 20 amps and two 14 AWG THHN copper conductors will be terminated onto the switch rated 15 amps. The required volume allowance for the switch rate 20 amps is ___ in.3 and the required volume allowance for the switch rate 15 amps is ___ in.3.

4.5, 4 Reference: 314.16(B)(4) and Table 314.16(B)

Receptacles of 15 and 20 amperes, 125 and 250 volts installed in a wet location shall have an enclosure that is weatherproof whether or not the attachment plug cap is inserted. An outlet box hood installed for this purpose shall be ___ and shall be identified as ___.

406.9(b)(1) extra duty/extra duty

For other than a totally enclosed switchboard or switchgear, a space not less than ___ ft shall be provided between the top of the switchboard or switchgear and any combustible ceiling, unless a noncombustible shield is provided between the switchboard or switchgear and the ceiling.

408.18(a) 3 ft

In addition to the requirement of 408.30, a panelboard shall be protected by an overcurrent protective device having a rating not greater than ___.

408.36 that of the panel board

Every circuit and circuit modification in a panelboard shall be legibly identified as to its ___ purpose or use.

408.4(a) clear, evident on the specific purpose or use

For the purposes of Article 408, a 3-pole circuit breaker shall be considered ___ overcurrent device(s).

408.54 Three overcurrent devices

The enclosure for a panelboard shall have the top and bottom wire-bending space sized in accordance with ___ for the largest conductor entering or leaving the enclosure.

408.55 table 312.6 (b)

Hanging luminaires located directly above any part of the bathtub shall be installed so that the luminaire is not less than ___ ft above the top of the bathtub rim.

410.10(d)(2) 8

Luminaires shall be constructed or installed so that adjacent combustible material will not be subjected to temperatures in excess of ___ °Fahrenheit.

410.11 194 Fahrenheit

A recessed luminaire that is not identified for contact with insulation shall have all recessed parts spaced at least ___ in. from combustible materials.

410.116(a)(1) 1/2 in

The terminal of an electric-discharge lamp shall be considered as a live part where any lamp terminal is connected to a circuit of over ___.

410.130 300 v

. ___ luminaires used in a show window can be externally wired.

410.14 chain-supported

Heavy-duty lighting track is lighting track identified for use exceeding ___.

410.153 20 amp

Lighting track shall be securely mounted so that each fastening will be suitable for supporting the maximum weight of luminaires that can be installed. Unless identified for supports at greater intervals, a single section ___ ft or shorter in length shall have ___ supports.

410.154 4 ft-2 support

A recessed incandescent luminaire with a completely enclosed light source installed in the ceiling of a clothes closet must have a minimum clearance of ___ in. between the luminaire and the nearest point of the closet storage space.

410.16(c)(3) 6

___ luminaires surface mounted over concealed outlet, or pull or junction boxes and designed not to be supported solely by the outlet box shall be provided with suitable openings in back of the luminaire to provide access to the wiring in the boxes.

410.24(b) Electric-Discharge and LED

A metal pole supporting a luminaire must have a handhole not less than ___ in. with a raintight cover to provide access to the supply terminations within the pole or pole base.

410.30 2inx4in

No handhole shall be required in a pole supporting a luminaire that is ___ ft or less in height abovegrade where the supply wiring method continues without splice or pull point, and where the interior of the pole and any splices are accessible by removing the luminaire.

410.30(b)ex 1 8ft

No handhole shall be required in a metal pole supporting a luminaire that is ___ ft or less in height above grade that is provided with a hinged base.

410.30(b)ex2 20 ft

Luminaires shall be wired with conductors having insulation suitable for the ___ to which the conductors will be subjected.

410.52 Environmental condition, current, voltage, and temperature

Flexible cords shall be secured to the undersides of showcases so that a separation between cases not in excess of ___ in. nor more than ___ in. between the first case and the supply receptacle will be ensured.

410.59(c) 2 in-12in

Electric-discharge luminaires provided with mogul-base, screw shell lampholders shall be permitted to be connected to branch circuits of ___ amperes or less by cords complying with 240.5.

410.62(c)(2) 50 amp

Luminaires shall not be used as a raceway for circuit conductors unless they are ___ and marked for use as a raceway.

410.64(a) listed

The screw shell of all sign lampholders supplied by a grounded circuit shall be connected to the ___ conductor.

410.90 Grounded

Lampholders of the screw shell type shall be installed for use as lampholders only. Where supplied by a circuit having a ___ conductor, the ___ conductor shall be connected to the screw shell.

410.90 grounded-grounded

The maximum length cord permitted on a built-in dishwasher is ___ ft.

422.16 (b)(2)(2) 6.5

A permanently connected dishwasher has a nameplate rating of 780 volt-amperes.The circuit breaker is permitted to serve as the disconnecting means where it is: within sight from the dishwasher. lockable in accordance with 110.25. capable of being locked in the closed position.a) I only b) I or III only c) I or II only d) I, II, or III

422.31(b) c

The disconnecting means for motor circuits rated 1000 volts, nominal, or less, shall have an ampacity rating not less than ___ of the full-load current rating of the motor.

430.110(a) 115%

Branch-circuit conductors that supply a single motor used in a continuous duty application shall have an ampacity of not less than ___ of the motor full-load current rating as determined by 430.6(A)(1), or not less than specified in 430.22(A) through (G).

430.22 125%

Conductors for a motor used in a short-time, intermittent, periodic, or varying duty application shall have an ampacity of not less than the percentages of the motor nameplate current ratings shown in ___, unless the authority having jurisdiction grants special permission for conductors of lower ampacity.

430.22(e) table 430.22(e)

For a nonautomatically started motor, the overload protection shall be permitted to be shunted or cut out of the circuit during the starting period of the motor if the device by which the overload protection is shunted or cut out shall not be left in the starting position and if fuses or inverse-time circuit breakers rated or set at not over ___ of the full-load current of the motor are located in the circuit so as to be operative during the starting period of the motor.

430.34(a) 400%

Multispeed motors shall be marked with the code letter designating the locked-rotor kilovolt-ampere (kVA) per horsepower (hp) for the highest speed at which the motor ___.

430.7(b)(1) can be started

Each controller shall be capable of starting and stopping the motor it controls and shall be capable of interrupting the ___ of the motor.

430.82(a) locked-rotor current

Terminals of motors and controllers shall be suitably marked or colored where necessary to indicate ___.

430.9(a) The proper connection

A disconnecting means serving a hermetic refrigerant motor compressor shall be selected on the basis of the nameplate rated-load current or branch-circuit selection current, whichever is greater, and locked-rotor current, respectively, of the motor compressor. The ampere rating shall be at least ___ of the nameplate rated-load current or branch- circuit selection current, whichever is greater.

440.12 (a)(1) 115 %

When a grounding terminal bar is required to be installed in a dry-type transformer enclosure, the terminal bar shall be bonded to the enclosure in accordance with 250.12 and shall not be installed on or over any ___ of the enclosure.

450.10(a) Vented Portion

Where a terminal bar is installed in a dry-type transformer, the terminal bar shall be bonded to the enclosure in accordance with 250.12 and shall not be installed on or over any ___ of the enclosure.

450.10(a) Vented Portion

Dry-type transformers 1000 volts, nominal, or less and not exceeding ___ shall be permitted in hollow spaces of buildings not permanently closed in by structure.

450.13(b) 50kva

Transformers, other than Class 2 or Class 3 transformers, shall have a disconnecting means located either in sight of the transformer or in a remote location .Where located in a remote location, the disconnecting means shall be lockable open in accordance with ___, and its location shall be field marked on the transformer.

450.14 110.25

Transformers, other than ___, shall have a disconnecting means located either in sight of the transformer or in a remote location .Where located in a remote location, the disconnecting means shall be lockable in accordance with 110.25, and its location shall be field-marked on the transformer.

450.14 class 2 and class 3 transformer

The walls and roofs of transformer vaults shall be constructed of materials that have approved structural strength for the conditions with a minimum fire resistance of ___.

450.42 3 hours

Each doorway leading into a transformer vault from the building interior shall be provided with a tight-fitting door that has a minimum fire rating of ___.

450.43(a) 3 hours

A door sill or curb that is of an approved height that will confine the oil from the largest transformer within the vault shall be provided, and in no case shall the height be less than ___ in.

450.43(d) 4 in

All transformer vault ventilation openings to the indoors shall be provided with automatic closing fire dampers that operate in response to a vault fire. Such dampers shall possess a standard fire rating of not less than ___.

450.45(e) 1 1/2 hours

Vaults containing more than ___ transformer capacity shall be provided with a drain or other means that will carry off any accumulation of oil or water in the vault unless local conditions make this impracticable.

450.46 100 kva

Capacitors containing more than ___ gallons of flammable liquid shall be enclosed in vaults or outdoor fenced enclosures complying with Article 110, Part III.

460.3(a) 3

The residual voltage of a 480-volt capacitor shall be reduced to ___, nominal, or less, within ___ after the capacitor is disconnected from the source of supply.

460.6(a) 50v/1 min

The ampacity of capacitor circuit conductors shall not be less than ___ of the rated current of the capacitor.

460.8(a) 135 amp

In bulk storage plants, the space between ___ ft and ___ ft from the open end of an aboveground (fixed roof) tank vent, extending in all directions, is a Class I, Division 2 or Zone 2 location.

5, 10 Table 515.3

A ___ location is a location in which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment.

500.5(b)(2) class I division 2

A ___ location is a location in which combustible dust is in the air under normal operating conditions in quantities sufficient to produce explosive or ignitible mixtures.

500.5(c)(2)(1) class II division 1

A ___ location is a location in which easily ignitible fibers/flyings are handled, manufactured, or used.

500.5(d) class III

___, ___, ___, ___, and ___ are five acceptable hazardous (classified) location protection techniques for electrical and electronic equipment.

500.7 Purge and Pressuarized, intrinsic safety Explosion-proof equipment duct ignition, Dusttight

Regardless of the classification of the location in which it is installed, equipment that depends on a single compression seal, diaphragm, or tube to prevent flammable or combustible fluids from entering the equipment, shall be identified for a ___ location.

500.8(b)(4) class I division 2

In Class I, Division 1 locations, NPT threaded entries into explosionproof equipment shall be made up with at least ___ threads fully engaged.

500.8(e)(1) 5 Thread

In each conduit run passing from a Class I, Division 2 location into an unclassified area, the sealing fitting shall be located within ___ ft of the boundary.

501.10(4) 10ft

A ½-in. threaded steel IMC is terminating into a ½-in. sealing fitting.The minimum thickness of the sealing compound shall be ___ in.

501.15(c)(3) 5/8in

In Class II, Division 1 locations, boxes and fittings shall be provided with ___ for connection to conduit or cable terminations, and shall be dusttight.

502.10(3) Threaded bosses

In Class III, Division 2 locations, transformers and capacitors shall comply with NEC Section ___.

502.100(b) 502.100(b)

Equipment installed in Class III locations shall be able to function at full rating without developing ___ high enough to cause excessive dehydration or gradual carbonization of accumulated fibers/flyings

503.5 Surface Temperature

For each major repair garage floor, the entire area up to a level of ___ in. above the floor shall be considered to be a Class I, Division 2 location if ventilation is not provided.

511.3(c)table 18 in

In commercial garages, lamps and lamp holders for fixed lighting that is located over lanes through which vehicles are commonly driven shall be located no less than ___ ft above the floor level.

511.7(b)(1)((6) 12ft

Aircraft energizers shall be designed and mounted so that all electric equipment and fixed wiring will be at least ___ in. above floor level.

513.10(c)(1) 18 in

The entire area of an aircraft hangar, including any adjacent and communicating areas not suitably cut off from the hangar, shall be classified as a Class I, Division 2 or Zone 2 location up to a level ___ in. above the floor.

513.3(b) 18in

In aircraft hangars, the area within ___ ft horizontally from aircraft power plants or aircraft fuel tanks shall be classified as a Class I, Division 2 or Zone 2 location that shall extend upward from the floor to a level ___ ft above the upper surface of wings and of the engine enclosures.

513.3(c)1 5ft/5/ft

Fuel dispensing systems shall be provided with one or more clearly identified emergency shutoff devices or electrical disconnects. Such devices or disconnects shall be installed in approved locations but not less than ___ ft or more than ___ ft from the fuel dispensing devices that they serve.

514.11 20ft/100ft

An outdoor gasoline dispensing device is considered to be a Class I, Division 2 location up to ___ in. above grade level, extending ___ ft horizontally in all directions from dispenser enclosure.

514.3(b)(2) 18 in/20ft

For open dipping and coating processes, electrical wiring and electrical utilization equipment located within ___ feet of a vapor source shall be suitable for Class I, Division 1 or Class I, Zone 1 locations.

516.29(2) 5 ft

For open printing, dipping, and coating processes, the space ___ ft above the floor and extending ___ ft horizontally in all directions from the Class I, Division 1 or Class I, Zone 1 location shall be classified as Class I, Division 2 or Class I, Zone 2, and electrical wiring and electrical utilization equipment located within this space shall be suitable for Class I, Division 2 or Class I, Zone 2 locations, whichever is applicable.

516.29(4) 3ft/20ft

The ___ is a system of feeders and branch circuits supplying power for task illumination, fixed equipment, select receptacles, and select power circuits serving areas and functions related to patient care and that are automatically connected to alternate power sources by one or more transfer switches during interruption of the normal power source.

517.2 Critical branch

A(n) ___ is a system comprised of alternate sources of power and all connected distribution systems and ancillary equipment, designed to ensure continuity of electrical power to designated areas and functions of a health care facility during disruption of normal power sources, and also designed to minimize disruption within the internal wiring system.

517.2 essential electrical system

___ is a jack or terminal that serves as the collection point for redundant grounding of electric appliances serving a patient care vicinity or for grounding other items in order to eliminate electromagnetic interference problems.

517.2 patient equipment grounding point

___ is the area in a patient care space where a procedure is performed that is normally subject to wet conditions while patients are present, including standing fluids on the floor or drenching of the work area, either of which condition is intimate to the patient or staff.

517.2 wet procedure location

The cover plates for the electrical receptacles supplied from the life safety and critical branches shall have a distinctive ___ so as to be readily identifiable.

517.31 color or Marking

One transfer switch shall be permitted to serve one or more branches or systems in a limited care facility with a continuous load on the switch of ___ kVA (___ kW) or less.

517.31(b)(2) 150kva/120kw

The life safety and critical branches shall be installed and connected to the alternate power source so that all functions specified herein for the life safety and critical branches are automatically restored to operation within ___ after interruption of the normal source.

517.32(b) 10 second

Type 2 essential electrical systems for nursing homes and limited care facilities shall be divided into the following two branches, the ___ branch and the ___ branch.

517.42(a)(1)(2) live safety and equipment branch

In locations where flammable anesthetics are employed, the entire area shall be considered to be a Class I, Division 1 location that shall extend upward to a level ___ ft above the floor.

517.60(a)(1) 5ft

A flexible cord storage device, within a hazardous (classified) anesthetizing location, shall not subject the cord to bending at a radius of less than ___ in.

517.61(a)(7) 3 in

In any anesthetizing area, all metal raceways and metal-sheathed cables, and all normally non-current-carrying conductive portions of fixed electric equipment, shall be ___.

517.62 connected to an equipment grounding conductor

In patient care spaces, all non-current-carrying conductive surfaces of fixed electrical equipment likely to become energized that are subject to personal contact, operating at over ___, shall be directly connected to an insulated copper equipment grounding conductor that is clearly identified along its entire length by green insulation.

517.63(b)(3) 100 volt

Wall-mounted remote-control stations for remote-control switches operating at ___ or less shall be permitted to be installed in any anesthetizing location.

517.63(d) 24 volts

Individual branch circuits shall not be required for portable, mobile, and transportable medical X-ray equipment requiring a capacity of not over ___.

517.71(b) 60 amp

A disconnecting means rated for at least ___% of the input required for the momentary rating or ___% of the input required for the long-time rating of the X-ray equipment, whichever is greater, shall be provided in the supply circuit.

517.72(a) 50%-100%

For portable X-ray equipment connected to a 120-volt branch circuit of ___ or less, a grounding-type attachment plug and receptacle of proper rating shall be permitted to serve as a disconnecting means.

517.72(c) 30 amp

The ampacity of supply branch-circuit conductors and the current rating of overcurrent protective devices for X-ray equipment shall not be less than ___% of the momentary rating or ___% of the long-time rating, whichever is greater.

517.73(a)(1) 50%--100%

The ampacity of conductors and the rating of overcurrent protective devices shall not be less than ___ of the current rating of medical X-ray therapy equipment.

517.73(b) 100%

Size 18 or 16 AWG fixture wires as specified in 725.49 and flexible cords shall be permitted for the control and operating circuits of X-ray and auxiliary equipment where protected by not larger than ___ -ampere overcurrent devices.

517.74(b) 20 amp

X-ray low-voltage cables connecting to oil-filled units that are not completely sealed, such as transformers, condensers, oil coolers, and high-voltage switches, shall have insulation of the ___ type.

517.78 oil resistance

Occupancy of any room or space for assembly purposes by less than ___ persons in a building of other occupancy, and incidental to such other occupancy, shall be classified as part of the other occupancy.

518.2(b) 100

In exhibition halls used for display booths, as in trade shows, the temporary wiring shall be permitted to be installed in accordance with Article ___.

518.3(b) Art 590

A(n) ___ is an assembly containing one male and two female cord connectors used to connect two loads to one branch circuit.

520.2 two-fer

In a fixed stage switchboard in a theater, the circuit supplying a solid-state dimmer shall not exceed ___ volts between conductors unless the dimmer is listed specifically for higher voltage operation.

520.21 150

Fixed stage switchboards shall be ___ but shall not be required to be located on or adjacent to the stage.

520.21(2) Readily Accesible

Footlights, border lights, and proscenium side lights shall be arranged so that no branch circuit supplying such equipment will carry a load exceeding ___.

520.4(a) 20 amp

A(n) ___ is a factory-assembled structure or structures transportable in one or more sections that is built on a permanent chassis and designed to be used as a dwelling without a permanent foundation where connected to the required utilities, and includes the plumbing, heating, air-conditioning, and electric systems contained therein.

550.2 Mobile Home

Outdoor mobile home disconnecting means shall be installed so the bottom of the enclosure containing the disconnecting means is not less than ___ ft above finished grade or the working platform.

550.31(f) 2 ft

The service equipment shall be located in sight from and not more than ___ ft from the exterior wall of the mobile home it serves.

550.32(a) 30ft

A travel trailer is a vehicular unit, mounted on wheels, designed to provide temporary living quarters for recreational, camping, or travel use, of such size or weight as not to require special highway movement permits when towed by a motorized vehicle, and of gross trailer area less than ___ ft2.

551.2 320

Every recreational vehicle site with electrical supply shall be equipped with recreational vehicle site supply equipment with at least ___ 20-ampere, 125-volt weather-resistant receptacle.

551.71(a) one

A minimum of ___% of all recreational vehicle sites with electrical supply shall be equipped with a 30-ampere, 125-volt receptacle.

551.71(b) 70%

A minimum of ___% of existing and ___% of all new recreational vehicle sites with electrical supply shall each be equipped with a 50-ampere, 125/250-volt receptacle.

551.71(c) 20/40

Open conductors of not over 1000 volts, nominal, shall have a horizontal clearance of not less than ___ ft and a vertical clearance of not less than ___ ft in all areas subject to recreational vehicle movement.

551.79 3ft/18ft

A ___ is a building unit, as defined in Article 100, that floats on water, is moored in a permanent location, and has a premises wiring system served through connection by permanent wiring to an electricity supply system not located on the premises.

555,2 Floating building

Single receptacles that provide shore power for boats shall be rated not less than ___ amperes

555.33(a)(4) 30 amp

The service equipment for a floating building, dock, or marina shall be located on land ___, but not on or in the structure itself or any other the floating structure.

555.4 Adjacent to the structure served

Not more than ___ ft of high-voltage cable shall be permitted in nonmetallic conduit from a high-voltage terminal of a neon transformer (over 1000 volts, nominal) supply to the first neon tube.

600.32(j)(1)(2) 50 ft

Branch circuits that supply neon tubing installations shall not be rated in excess of ___ amperes.

600.5(c)(1) 30 amp

Branch circuits that supply neon tubing installations shall not be rated in excess of ___.

600.5(c)(1) 30 amp

Branch circuits that supply all other signs and outline lighting systems shall be rated not to exceed ___.

600.5(c)(2) 20 amp

Switches, flashers, and similar devices controlling sign transformers and electronic power supplies shall be rated for controlling inductive loads or have a current rating not less than ___ of the current rating of the transformer or the electronic power supply. a) 80% b) 100% c) 125% d) 200%

600.6(4)(b) d) twice

Switches, flashers, and similar devices controlling transformers and electronic power supplies shall be rated for controlling inductive loads or have a current rating not less than ___ of the current rating of the transformer or the electric power supply. a) 80% b) 100% c) 125% d) 200%

600.6(b) twice 200%

Sign or outline lighting system equipment shall be at least ___ ft above areas accessible to vehicles unless protected from physical damage.

600.9(a) 14ft

Manufactured wiring systems cable shall be listed Type AC cable or listed Type MC cable containing nominal 600-volt, ___ AWG insulated copper conductors.

604.100(a)(1) 8-12 awg

Article ___ covers electrical equipment, lighting accessories, and wiring systems used to connect, contained within, or installed on office furnishings.

605.1(a) 605

Hoist and monorail hoist and their trolleys that are not used as part of an overhead traveling crane shall not require individual motor overload protection, provided the largest motor does not exceed ___ and all motors are under manual control of the operator.

610.43(d) 7 1/2 hp

For cranes and hoists, the dimension of the working space in the direction of access to live parts that are likely to require examination, adjustment, servicing, or maintenance while energized shall be a minimum of ___ ft.

610.57 2 1/2 ft

Vertical runs of elevator wireways shall be securely supported at intervals not exceeding ___ ft and shall have not more than one joint between supports.

620.32 15ft

All live parts of electrical apparatus in the hoistways, at the landings, in or on the cars of elevators and dumbwaiters, in the wellways or the landings of escalators or moving walk- ways, or in the runways and machinery spaces of platform lifts and stairway chairlifts shall be ___.

620.4 enclosed to protect against accidental contact

Traveling cables that are suitably supported and protected from physical damage shall be permitted to be run without the use of a raceway from inside the hoistway, to elevator controller enclosures and to elevator car and machine room, control room, machinery space, and control space connections that are located outside the hoistway for a distance not exceeding ___ ft in length as measured from the first point of support on the elevator car or hoistway wall, or counterweight where applicable, provided the conductors are grouped together and taped or corded, or in the original sheath.

620.44(2) 6ft

All receptacles within ___ ft of a therapeutic tub shall be protected by a ground-fault circuit interrupter.

620.60(d)(2)(e) 6f

Duty on elevator driving machine motors shall be rated as ___.

620.61(b)(1) Intermittent

A(n) ___ is a device external to the electric vehicle that transfers power via the contactless coupling as port of a wireless power transfer system.

625.2 Primary Pad

Overcurrent protection for feeders and branch circuits supplying electric vehicle supply equipment (EVSE), including bidirectional EVSE, and WPTE shall be sized for ___ duty and shall have a rating of not less than ___% of the maximum load of the equipment.

625.41 Continuous duty/125%

Unless specifically listed and marked for the location, the coupling means of the electric vehicle supply equipment (EVSE) shall be stored or located at a height of not less than ___ in. above the floor level for indoor locations and ___ in. above the grade level for outdoor locations.

62550 18in/24in

Conductors that supply one or more arc welders shall be protected by an overcurrent device rated or set at not more than ___ of the conductor ampacity.

630.12(b) 200%

The ampacity of the supply conductors for a resistance welder that can be operated at different times, at different values of primary current, or duty cycle shall not be less than ___ of the rated primary current for manually operated nonautomatic welders.

630.31(a)(1) 50%

Audio system equipment supplied by branch-circuit power shall not be placed horizontally within ___ ft of the inside wall of a pool, spa, hot tub, or fountain, nor within ___ ft of the prevailing or tidal high water mark.

640.10 5ft/5f

The branch-circuit conductors supplying one or more units of information technology equipment shall have an ampacity not less than ___ of the total connected load.

645.5(a) 125%

Information technology equipment shall be permitted to be connected to a branch circuit by a power-supply cord; the power-supply cord shall not exceed ___ ft.

645.5(b)(1) 15ft

A 125-volt, single-phase, 15- or 20-ampere-rated receptacle having one of its current-carrying poles connected to a grounded circuit conductor shall be located within ___ ft of all permanently installed 15- or 20-ampererated 60/120-volt technical power-system receptacles

647.7(a)(3) 6ft

Branch-circuit conductors supplying one or more units of electroplating equipment shall have an ampacity of not less than ___ of the total connected load.

669.5 125%

A(n) ___ is a power-driven machine (or a group of machines working together in a coordinated manner), not portable by hand while working, that is used to process material by cutting; forming; pressure; electrical, thermal, or optical techniques; lamination; or a combination of these processes. It can include associated equipment used to transfer material or tooling, including fixtures, to assemble/disassemble, to inspect or test, or to package.

670.2 Industrial Machine

Where no branch-circuit short-circuit and ground-fault protective device is provided with the industrial machine, the rating or setting of the overcurrent protective device shall be based on ___, as applicable.

670.4(c) 430.52 and 430.53

The conductors to the hoistway door interlocks from the hoistway riser shall be flame retardant and suitable for a temperature of not less than ___.

680.11(a)(1) 200 C/392 f

Storable swimming pools are capable of holding water to a maximum depth of ___ in.

680.2 42

A(n) ___ is a structure designed to support a wet-niche luminaire assembly and intended for mounting in a pool or fountain structure.

680.2 Forming shell

Where a permanently installed pool is installed, at least one 125-volt, 15- or 20-ampere receptacle on a general-purpose branch circuit shall be located a minimum of ___ ft from and not more than ___ ft from the inside wall of the pool.

680.22 6ft/20ft

All 15- and 20-ampere, single-phase 125-volt receptacles located within ___ ft of the inside wall of a pool shall be protected by a Class A ground-fault circuit interrupter.

680.22(a)(4) 20ft

In new outdoor pool areas, ceiling-suspended (paddle) fans shall not be installed above the pool or over the area extending ___ ft horizontally from the inside walls of the pool unless no part of the fan is less than ___ft above the maximum water level.

680.22(b)(1) 5ft/12ft

Existing luminaires and lighting outlets located less than ___ ft measured horizontally from the inside walls of a pool shall be at least ___ ft above the surface of the maximum water level, shall be rigidly attached to the existing structure, and shall be protected by a ground-fault circuit interrupter.

680.22(b)(3) 5ft/5ft

Switching devices shall be located at least ___ ft horizontally from the inside walls of a pool unless separated from the pool by a solid fence, wall, or other permanent barrier that provides at least a ___ ft reach distance.

680.22(c) 5ft/5ft

Transformers and power supplies used for the supply of underwater luminaires shall incorporate either a transformer of the isolated winding type with an ungrounded secondary that has a ___ between the primary and secondary windings.

680.23(2) Grounded metal barrie

Luminaires mounted in permanently installed swimming pool walls shall be installed with the top of the luminaire lens at least ___ in. below the normal water level of the pool, unless the luminaire is listed and identified for use at lesser depths.

680.23(a)(5) 18 in

The termination of the 8 AWG bonding jumper in a permanently installed swimming pool forming shell shall be covered with or encapsulated in a(n) ___ to protect the connection from the possible deteriorating effect of pool water.

680.23(b)(2)(b) Listed potting compound

A junction box connected to a conduit that extends directly to a forming shell shall be located not less than ___ in., measured from the inside of the bottom of the box, above the ground level, or pool deck, or not less than ___ in. above the maximum pool water level, whichever provides the greater elevation.

680.24(a)(2)(a) 4in/8in

A junction box connected to a conduit that extends directly to a forming shell shall be provided with a number of grounding terminals that shall be ___.

680.24(d) no fewer than one more than the number of conduit entries

All fixed metal parts that are within ___ ft horizontally of the inside walls of a permanently installed swimming pool and within ___ ft above the pool's maximum water level shall be bonded.

680.26(7)ex 2 and3 5ft/12ft

A clearly labeled emergency shutoff or control switch for the purpose of stopping the motor(s) that provide power to the recirculation system and jet system shall be installed at a point readily accessible to the users and at least ___ ft away, adjacent to, and within sight from the spa or hot tub.

680.41 5ft

Luminaires located over a spa or within 5 ft (1.5 m) from the inside walls of the spa shall be permitted to be not less than ___ ft above the maximum water level where protected by a GFCI.

680.43(b)(1)(b) 7ft 6in

A fixed or stationary electric sign installed inside a fountain shall be at least ___ ft inside the fountain measured from the outside edges of the fountain.

680.57(c)(1) 5ft

Hydromassage bathtub electrical equipment shall be ___ without damaging the building structure or building finish.

680.73 accessible

The minimum bending radius for metal-clad (corrugated sheath) cable is ___ times the external diameter of the metallic sheath.

7 times

Twenty-four ft (six 4-ft sections) of track lighting must be installed in a continuous row in a retail store.What is the minimum number of supports required?

7. Two supports in the first 4-foot section and one support in each additional 4-foot section Reference: 410.154

Where nonmetallic-sheathed cable is run at angles with joists in unfinished basements, it shall be permissible to secure cables not smaller than three ___ AWG conductors directly to the lower edges of the joists. a) 12 b) 10 c) 8 d) 6

8 awg

Nonmetallic surface extensions must be secured in place by approved means at intervals not exceeding ___ in.

8 inch 382.30(A)

Most conduit and tubing type raceways have a maximum equivalent of four ___ bends between pull points, for example, conduit bodies and boxes.

90 degree (344.26)

Armored cable installed in thermal insulation shall have conductors rated at ___.The ampacity of the cable installed in these applications shall not exceed that of a 60°C-rated conductor. a) 60°C b) 75°C c) 90°C d) 90°F

90(194 f)

How many 14 AWG THHN conductors, including an equipment grounding conductor, can be installed in a ⅜-in. flexible metal conduit using inside fittings?

Annex C table C.3 4

The ___ is the connection between the grounded circuit conductor and the equipment grounding conductor, or the supply-side bonding jumper, or both, at the service.

Art 100 Main Bonding Jumper

A(n) ___ is defined as a circuit other than field wiring in which any arc or thermal effect produced under intended operating conditions of the equipment is not capable, under specified test conditions, of igniting the flammable gas-, vapor-, or dust-air mixture.

Article 100 Def Article 100 def nonincendive circuit

___ shall be placed in all service-entrance motor-control centers to isolate service busbars and terminals from the remainder of the motor control center.

Barriers Reference: 430.97(E)

In aircraft hangars, any pit or depression below the level of the hangar floor shall be classified as a ___ location that shall extend up to said floor leve

Class I, Division 1 or Zone 1 Reference: 513.3(A)

In bulk storage plants, aboveground (fixed roof) tank vents shall be classified as ___ within 5 ft (1.5 m) of the open end of the vent, extending in all directions.

Class I, Division 1 or Zone 1 Reference: Table 515.3

A ___ location is a location in which easily ignitible fibers/flyings are handled, manufactured, or used.

Class III, Division 1 Reference: 500.5(D)(1)

Where the NEC specifies that one equipment shall be "within sight of " another equipment, the specified equipment shall be visible and not more than ___ ft distant from the other.

Definition In Singh from(50 feet)

A ___ is a conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.

Grounding Electrode conductor

The two to six service disconnecting means shall be permitted to consist of: not more than six sets of circuit breakers mounted in a single enclosure not more than six panelboards with a main service disconnecting means in each panelboard enclosurea) I only b) II only c) both I and II d) neither I nor II

II only Reference: 230.71(B)

___ is a factory assembly of one or more insulated circuit conductors with or without optical-fiber members enclosed in an armor of interlocking metal tape or a smooth or corrugated metallic sheath.

MC Cable

A cable assembly can have the white insulated conductor permanently reidentified to indicate its use as an ungrounded conductor but the reidentified conductor cannot be ___.

The return conductor from the switch to the outlet

A hermetic refrigerant motor compressor's branch-circuit short-circuit and ground-fault protective device shall be capable of carrying ___ of the motor's starting current. a) 100% b) 125% c) 150% d) 175%

a) 100% The listed reference states that the device must be capable of carrying the starting current of the motor. The key to this question is starting current, not rated-load current.

A(n) ___ is used to provide simultaneous service (or treatment) to four or more patients that provides, on an outpatient basis, treatment for patients that renders the patients incapable of taking action for self-preservation under emergency conditions without the assistance of others.

ambulatory health care occupancy Reference: 517.2 (Ambulatory Health Care Occupancy)

The minimum size THHN copper neutral conductor permitted for an 83⁄4 kW, 240-volt, 3-wire household electric range is ___. a) 12 AWG b) 10 AWG c) 8 AWG d) 6 AWG

b) 10 AWG Reference: 210.19(A) Ex 2

For a one-family dwelling, at least one receptacle outlet shall be installed in each: basement. attached garage. detached garage. a) I only b) I and II only c) II and III only d) I, II, and III

b) I and II only. A receptacle in a detached garage is required only if the garage has electrical power.

For raceway terminating at the tray, a listed ___ or adapter shall be used to securely fasten the raceway to the cable tray system.

cable tray clamp Reference: 392.18(G)

___ is defined as being surrounded by a case, housing, fence, or walls that prevent persons from accidentally contacting energized parts.

enclosed Reference: Article 100 (Enclosed)

A 480-volt transformer, equipped with coordinated thermal overload protection by the manufacturer and arranged to interrupt the primary current, shall be permitted to have primary overcurrent protection rated or set at a current value that is not more than ___ the rated current of the transformer for a transformer having 8% impedance.

four times (or 400%) Reference: Table 450.3(B) Note 3

The ___ is a system of feeders and branch circuits supplying power for lighting, receptacles, and equipment essential for life safety that is automatically connected to alternate power sources by one or more transfer switches during interruption of the normal power source.

life safety branch Reference: 517.2 (Life Safety Branch)

In both exposed and concealed locations where nonmetallic-sheathed cables pass through either factory- or field-punched, cut, or drilled slots or holes in metal members, the cable shall be protected by ___ or ___ covering all metal edges that are securely fastened in the opening prior to installation of the cable.

listed bushing or grommets fastened

Where Type MI cable terminates, a seal shall be provided immediately after stripping to prevent the entrance of ___ into the insulation.

moisture

In hollow spaces, vertical shafts, and ventilation (or air-handling) ducts, electrical installations must _______________________ or products of combustion

must not substantially increase possible spread of fire 300.21

If a 1 1/4 setback is not possible, the cable must be protected from penetration by nails (or screws) by a minimum thick steel plate. A listed and marked steel plate less than in. (1.6 mm) thick that provides equal or better protection against nail or screw penetration can be installed.

1/16 300.4(d) Exception 3

A weatherproof metal junction box measuring 4 in. × 4 in. × 6 in. has been installed to support a luminaire.Two rigid metal conduits have been threaded wrenchtight into the threaded entries of the enclosure.The box has not yet been secured to the brick wall, but both conduits have been strapped to the wall 16 in. from the box.What additional support (from the following list) is required for this box? Two metal screws with plastic anchors Two toggle bolts Two drive pinsa) none b) I or II only c) I or III only d) I, II, or III

314.22(2) none

Splices and taps shall be permitted within a wireway provided they are accessible.The conductors, including splices and taps, shall not fill the wireway to more than ___ of its area at that point.

376.56 75%

Where insulated conductors are deflected within a wireway, either at the ends or where conduits, fittings, or other raceways or cables enter or leave the wireway, or where the direction of the wireway is deflected greater than ___, dimensions corresponding to one wire per terminal in Table 312.6(A) shall apply.

378.23 30 degree

Nonmetallic wireways shall be supported where run horizontally at intervals not to exceed ___ ft, and at each end or joint, unless listed for other support intervals

378.30(A) 3 feet

Floor-mounted Type FCC cable, cable connectors, and insulating ends shall be covered with carpet squares no larger than ___ in. square.

39.37 (314.14)

A 4 11⁄16-in. square box that is 2⅛ in. deep already contains two receptacles, two internal cable clamps, four 12 AWG THHN copper conductors (two black and two white), two grounding conductors, three wire nuts, two pigtails, and one equipment bonding jumper. (A flat plaster ring was used to secure the receptacles to the box.) How many more 12 AWG THHN copper conductors can be added to this box?

8. The total 12 AWG conductors permitted by Table 314.16(A) is 18. The flat plaster ring does not provide any additional cubic in. capacity. Two receptacles count as 4 [314.16(B)(4)], two internal cable clamps count as 1 [314.16(B)(2)], four 12 AWG THHN copper conductors count as 4 [314.16(B)(1)], and two grounding conductors count as 1 [314.16(B)(5)] 12 AWG conductors. There are 10 existing 12 AWG conductors. Three wirenuts, two pigtails, and one equipment bonding jumper do not count. Reference: 314.16