Code Practice
A: Safety to human life 700.2
"Emergency systems" are those systems legally required and classed as emergency by a governmental agency having jurisdiction. These systems are intended to automatically supply illumination and/or power essential for ______. A: Safety to human life B: police and emergency services exclusively C: community activity D: public recreation
D: individual Article 100 "Branch Circuit, Individual"
A branch circuit that supplies only one utilization equipment is a(n) ______ branch circuit. A: general-purpose B: special-purpose C: isolated D: individual
D: grounded Article 100 "Grounded (Grounding)"
Connected (connecting) to ground or to a conductive body extends the ground connection is called "_______". A: all of these B: equipment grounding C: bonded D: grounded
C: 3 ft 358.30(A)
EMT run between termination points shall be securely fastened within _____ of each outlet box, junction box, device box, cabinet, conduit body, or other tubing termination. A: 18 in. B: 12 in. C: 3 ft D: 2 ft
A: accessible 110.26(F)
Electrical equipment rooms or enclosures housing electrical apparatus that are controlled by a lock(s) shall be considered _______ to qualified persons. A: accessible B: readily accessible C: secured D: available
D: wiring 90.1(B) note
Electrical hazards often occur because the initial _____ did not provide for increases in the use of electricity and therefore wiring systems become overloaded. A: inspection B: builder C: owner D: wiring
C: internal 90.7
Factory-installed _______ wiring of listed equipment need not be inspected at the time of installation of the equipment, except to detect alterations or damage. A: all of these B: external C: internal D: associated
A: 600 V 690.7
For one- and two-family dwellings, the maximum voltage for PV systems dc circuits is limited to ______. A: 600 V B: 1,000 V C: 30 V D: 50 V
B: 2 518.4(A)
Nonmetallic raceways encased in not less than _____ in. of concrete shall be permitted in assembly occupancies. A: 3 B: 2 C: 4 D: 1
D: Demand Factor Article 100
The ____ of any system is the ratio of the maximum demand of a system, or a part of a system, to the total connected load of a system. A: minimum load B: load C: calculated factor D: demand factor
B: 125 695.5(A)
Transformers that supply a fire pump motor shall be sized no less than ______ percent of the sum of the fire pump motor(s) and pressure maintenance pump motors, and 100 percent of associated fire pump accessory equipment. A: 300 B: 125 C: 250 D: 100
C: 4 ft 6 in. 320.30(C)
Type AC cable installed horizontally through wooden or metal framing members is considered supported where support does not exceed ______ intervals. A: 2 ft B: 6 ft C: 4 ft 6 in. D: 3 ft
D: 12 in. 330.30(B)
Type MC cable containing four or fewer conductors, sized no larger than 10 AWG, shall be secured within ______ of every box, cabinet, fitting, or other cable termination. A: 24 in. B: 8 in. C: 18 in. D: 12 in.
C: storage 110.26(B)
Working space shall not be used for _____. A: raceways B: lighting C: storage D: accessibility
B: egress lighting 525.23(C)
GFCI protection is not permitted at carnivals, circuses, and fairs for _____. A: nighttime operation lighting B: egress lighting C: portable structures D: amusement lighting
A: 36 in. 352.30(A)
PVC conduit shall be securely fastened within ____ of each box. A: 36 in. B: 6 in. C: 12 in. D: 24 in.
B: 30 A 555.33(A)(4)
Receptacles that provide shore power for boats shall be rated not less than ______. A: 15 A B: 30 A C: 60 A D: 20 A
D: hood 406.9(B)(1)
When 15 A and 20 A receptacles are installed in a wet location, the outlet box _____ shall be listed for extra-duty use. A: mounting B: threaded entry C: sleeve D: hood
D: 10 501.15(B)(2)
A conduit seal shall be required in each conduit run leaving a Class I, Division 2 location. The conduit sealing fitting shall be installed on either side of the boundary within _____ ft of the boundary. A: 3 B: 1 C: 5 D: 10
D: 15 V, 30 V 411.1
Article 411 covers lighting systems and their associated components operating at no more than ______ ac or ______ dc where wet contact is likely to occur. A: 125 V, 250 V B: 60 V, 125 V C: 30 V, 60 V D: 15 V, 30 V
C: 2 ft
At least one receptacle outlet shall be located within _______ of the outer end of a peninsular countertop or work surface. A: 3 ft B: 1 ft C: 2 ft D: 4 ft
C: cord Article 100 "Attachment Fitting" Note
By definition, an attachment fitting is different from an attachment plug because no _____ is associated with the fitting. A: wiring compartment B: cable C: cord D: fixture wire
C: an electrical system essentially free from hazard 90.1(B)
Compliance with provisions considered necessary for safety, which will not necessarily result in _______. A: good electrical service B: an electrical system essentially free from hazard C: an efficient electrical system D: all of these
B: 15 A 210.21(B)(3)
If a 20 A branch circuit supplies multiple receptacles, the receptacle shall have an ampere rating of no less than _______. A: 10 A B: 15 A C: 30 A D: 20 A
B: horsepower 430.109(A)(1)
If a motor disconnecting means is a motor-circuit switch, it shall be rated in ____. A: amperes B: horsepower C: locked-rotor current D: watts
B: Below 100°F 514.3(A)
In motor fuel dispensing facilities, where the authority having jurisdiction can satisfactorily determine that flammable liquids having a flash point ______, such as gasoline, will not be handled such locations shall not be required to be classified. A: Below 86°F B: Below 100°F C: Above 86°F D: Above 100°F
A: 6 210.8(B)(5)
In other than dwelling units, GFCI protection shall be provided for all 15 A and 20 A, 125 v, single-phase receptacles installed within _______ ft from the top inside edge of the bowl of a sink. A: 6 B: 5 C: 3 D: 4
A: 30 550.32(A)
Mobile home service equipment shall be located adjacent to the mobile home and located in sight from but not more than _____ ft from the exterior wall of the mobile home it serves. A: 30 B: 15 C: 40 D: 20
A: selectively coordinated 701.32
Overcurrent devices for legally required standby systems shall be _____ with all supply-side overcurrent devices. A: selectively coordinated B: installed in parallel C: series rated D: labeled
C: 8 250.52(A)(5)
Rod and pipe grounding electrodes shall not be less than ______ feet in length. A: 10 B: 6 C: 8 D: 20
C: on land adjacent to 555.4
Service equipment for floating docks or marinas shall be located ______ the floating structure. A: on B: any of these C: on land adjacent to D: in
B: 3 230.9(B)
The vertical clearance of final spans of overhead service conductors above, or within _____ ft measured horizontally of platforms, projections, or surfaces that will permit personal contact shall be maintained in accordance with 230.24(B). A: 10 B: 3 C: 8 D: 6
C: ungrounded 404.2(A)
Three-way and four-way switches shall be wired so that all switching is done only in the ____ circuit conductor. A: grounded B: equipment ground C: ungrounded D: neutral
D: galvanic action 342.14
Where practicable, contact of dissimilar metals shall be avoided in an IMC raceway installation to prevent the possibility of ______. A: short circuits B: corrosion C: ground faults D: galvanic action
B: 30 in. 250.53(A)(4)
Where rock button is encountered at an angle up to 45 degrees when driving a rod or pipe electrode, the electrode shall be permitted to be buried in a trench ______ deep. A: 6 ft B: 30 in. C: 10 ft D: 8 ft
B: documented 500.4
All areas designated as hazardous (classified) locations shall be properly _____ and shall be available to those authorized to design, install, inspect, maintain, or operate electrical equipment at these locations. A: maintained B: documented C: cleaned D: all of these
A: generally to all electrical installations 90.3
Chapters 1 through 4 of the NEC apply ________. A: generally to all electrical installations B: only to special occupancies and conditions C: only to special equipment and material D: all of these
A: replaced 600.4(B)(1)
For signs with a retrofitted illumination system, the sign shall be marked that the illumination system has been _________. A: replaced B: modified C: updated D: refurbished
B: cord set 590.6(A)(2)
For temporary power outlets existing or installed as permanent wiring, GFCI protection can be incorporated into a listed ______. A: any of these B: cord set C: circuit breaker D: receptacle
D: 18 501.15(A)(2)
In Class I, Division 1 locations, conduit seals entering pressurized enclosures, shall be installed within _____ in. from the enclosure marking. A: 24 B: 20 C: 12 D: 18
B: 4 250.66(B)
In an ac system, if the size of the grounding electrode conductor or bonding jumper connected to a concrete-encased electrode does not extend on to other types of electrodes that require a larger size of conductor, the grounding electrode conductor shall not be required to be larger than ____ AWG copper. A: 6 B: 4 C: 8 D: 10
D: 18 511.3(D) Table
In major repair garages where lighter-than-air gaseous fueled vehicles, such as vehicles fueled by natural gas or hydrogen, are repaired or stored, the area within _____ in. of the ceiling is classified as Class I, Division 2 unless otherwise indicated in the Table footnotes. A: 12 B: 6 C: 24 D: 18
C: 2 in. 800.18(B)
Indoor antenna and lead-in conductors for radio and television receiving equipment shall be separated by at least _____ from conductors of any electric light, power, or Class 1 circuit conductors, unless otherwise permitted. A: 18 in. B: 12 in. C: 2 in. D: 6 ft
D: bidirectional 90.2(A)(1)
Installations used to export electric power from vehicles to premises wiring for _____ current flow are covered by the NEC. A: secondary B: primary C: emergency D: bidirectional
A: internal 90.7
It is the intent of the NEC that factory-installed ______ wiring of listed equipment need not be inspected at the time of installation of the equipment, except to detect alterations or damage. A: internal B: all of these C: associated D: external
C: water 230.54(G)
Service-entrance and overhead service conductors shall be arranged so that _____ will not enter the service raceway or equipment. A: dust B: lightning C: water D: vapor
C: enclosed Article 100 "Enclosed"
Surrounded by a case, housing, fence, or wall(s) that prevents persons from accidentally contacting energized parts is called "___________". A: covered B: protection C: enclosed D: guarded
D: electric discharge lighting Article 100 "Electric-Discharge lighting"
Systems of illumination utilizing fluorescent lamps, high-intensity discharge (HID) lamps, or neon tubing are all types of ______. A: flood lighting B: security lighting C: area lighting D: electric discharge lighting
A: 6 A 402.3- types 402.5 - Table
The ampacity of 18 AWG TFFN is ______. A: 6 A B: 8 A C: 10 A D: 14 A
C: 14 600.9(A)
The bottom of sign and outline lighting system equipment shall be at least ____ ft above areas accessible to vehicles unless protected from physical damage. A: 12 B: 18 C: 14 D: 16
C: wet 300.5(B)
The interior of underground raceways shall be considered a _____ location. A: damp B: dry C: wet D: corrosive
C: 4 ft 110.26 Table, Condition 2
The minimum working space on a circuit for equipment operating at 750 volts-to-ground, with exposed live parts on one side and grounded parts on the other side of the working space, is ______. A: 3 ft B: 5 ft C: 4 ft D: 3 ft 6 in.
C: medium 800.110(B)
The raceway fill requirements of Chapters 3 and 9 shall apply to _____ -power network-powered broadband communications cable. A: low B: multiconductor C: medium D: high
B: 3 ft 6 in. 110.26 Table, Condition 2
The required working space for access to live parts of equipment operating at 300 volts-to-ground, where there are exposed live parts on one side and grounded parts on the other side, is ______. A: 3 ft B: 3 ft 6 in. C: 4 ft D: 5 ft
B: 50% 210.23(A)(2)
The total rating of utilization equipment fastened in place, other than luminaires, shall not exceed _______ of a multiple outlet branch circuit rating. A: 25% B: 50% C: 100% D: 80%
A: suitable insulating bushing or adapter 334.15(C)
Type NM cable on a wall of an unfinished basement installed in a listed raceway shall have a _____ installed at the point where the cable enters the raceway. A: suitable insulating bushing or adapter B: sealing fitting C: junction box D: bonding bushing
A: terminal bar 408.40
When separate equipment grounding conductors are provided in panelboards, a _____ shall be secured inside the cabinet. A: terminal bar B: terminal lug C: grounded conductor D: bonding jumper
D: electrical conductors, equipment, and raceways 90.2(A)
Which of the following systems shall be installed and removed in accordance with the NEC requirements? A: all of these B: signaling conductors, equipment, and raceways C: communications conductors, equipment, and raceways D: electrical conductors, equipment, and raceways
D: power-limited and non power limited 760.3(B)
________ fire alarm cables installed in ducts, plenums, or other spaces used for environmental air shall comply with 300.22. A: fire rated B: line-voltage C: metal-clad D: power-limited and non power limited
C: current-carrying electrical conductors Article 100 "Cable, Optical Fiber, composite"
Composite optical fiber cables contain optical fibers and ______. A: Recycled plastic B: strength members C: current-carrying electrical conductors D: vapor barriers
A: examined or treated 517.2
The "patient care space" is any space within a health care facility where patients are intended to be _____. A: examined or treated B: admitted C: registered D: evaluated
A: combustible dust 500.5(C)
Class II locations are those that are hazardous because of the presence of ____. A: combustible dust B: flammable gasses or vapors C: flammable liquids or gasses D: easily ignitable fibers/flying
D: 6 lb 314.27(A)(1) Ex
A vertically mounted luminaire weighing not more than ______ can be supported to a device box or plaster ring with no fewer than two No. 6 or larger screws. A: 8 lb B: 4 lb C: 10 lb D: 6 lb
B: 48 A 680.10
All electric pool water heaters shall have the heating elements subdivided into loads not exceeding _______. A: 20 A B: 48 A C: 60 A D: 35 A
A: 6 AWG 200.6(A)
An insulated grounded conductor ______ or smaller shall be identified by a continuous white or gray outer finish, or by three continuous white or gray stripes along its entire length on other than green insulation. A: 6 AWG B: 8 AWG C: 3 AWG D: 4 AWG
C: 691 691.1
Article ______ covers the installation of large-scale PV electric supply stations with a generating capacity of not less than 5,000 kW and not under the electric utility control. A: 690 B: 705 C: 691 D: 711
A: 4 AWG 200.6(B)
At the time of installation, grounded conductors ______ or larger can be identified by distinctive white or gray markings at their terminations. A: 4 AWG B: 6 AWG C: 10 AWG D: 8 AWG
A: existing buildings or structures 250.50 Ex
Concrete-encased electrodes of ______ shall not be required to be part of the grounding electrode system where the steel reinforcing bars or rods aren't accessible for use without disturbing the concrete. A: existing buildings or structures B: hazardous (classified) Location C: agricultural buildings with equipotential planes D: health care facilities
C: on or within 440.14
Disconnecting means for air-conditioning or refrigerating equipment can be installed ______ the air-conditioning or refrigerating equipment, but not on panels that are designed to allow access to the equipment, and not over the equipment nameplate. A: any of these B: within 100 ft of C: on or within D: on top of
A: in close proximity 300.5(H)(1)
Each direct-buried single conductor cable shall be located _____ in the trench to the other single conductor cables in the same parallel set of conductors, including equipment grounding conductors. A: in close proximity B: spaced apart C: perpendicular D: bundled together
A: fixed 400.12(A)
Flexible cord sets and power-supply cords shall not be used as a substitute for _____ wiring of a structure. A: fixed B: permanent C: concealed D: temporary
C: one 210.70(C)
For attics and underfloor spaces, utility rooms, and basements in all occupancies, at least ______ lighting outlet(s) containing a switch or controlled by a wall switch shall be installed where these spaces are used for storage or contain equipment requiring servicing. A: three B: four C: one D: two
A: hazardous (Classified) Locations Article 100 Part III
Part III of Article 100 contains definitions which are applicable to _______. A: hazardous (Classified) Locations B: electrical Systems Over 1,000 V C: healthcare Facilities D: solar (PV) Systems
A: arc-energy 240.67
Where a method to reduce clearing time for fuses rated 1200 A or greater is required in accordance with 240.67(B), the ______ reduction system shall be performance tested when first installed on site. A: arc-fault B: short-circuit C: arc-energy D: ground-fault
B: insulated 547.5(F)
Where an equipment grounding conductor is installed underground within an agricultural building, it shall be _____. A: bare B: insulated C: covered D: copper
A: 60°F 310.15(B)(2)
Where conductors are installed in raceways or cables exposed to direct sunlight on or above rooftops, a temperature adder of _____ shall be added to the outdoor temperature where the conduits are less than ⅞ in. from the rooftop. A: 60°F B: 30°F C: 40°F D: 50°F
A: 36 501.15(A)(3)
Where two or more explosion proof enclosures that require conduit seals are connected by nipples or runs of conduit not more than ______ inches long, a single conduit seal in each such nipple connection or run of conduit shall be considered sufficient if the seal is located not more than 18 inches from either enclosure. A: 36 B: 24 C: 12 D: 18
C: 6 410.2
Closet storage space is defined as a volume bounded by the sides and back closet walls extending from the closet floor vertically to a height of _____ ft or the highest clothes-hanging rod at a horizontal distance of 2 ft from the sides and back of the closet walls. A: 8 B: 9 C: 6 D: 7
A: ungrounded 210.4(B)
Each multiwire branch circuit shall be provided with a means that will simultaneously disconnect all ______ conductors at the point where the branch circuit originates. A: ungrounded B: circuit C: grounding D: grounded
D: equipment grounding conductor 410.40
Luminaires and lighting equipment shall be connected to a(an) _______. A: grounding electrode conductor B: grounded conductor C: Any of these D: equipment grounding conductor
D: shall not be 408.43
Panelboards _____ installed in the face-up position. A: approved for such use, may be B: listed for such purpose, may be C: are permitted to be D: shall not be
A: in a face-up position 406.5(G)(1)
Receptacles in or on countertop surfaces or work surfaces shall not be installed _____, unless listed for countertop or work surface appliances. A: in a face-up position B: on the kitchen small-appliance circuit C: on GFCI circuits D: in the sides of cabinets
A: shore power 555.2
The electrical equipment required to power a floating vessel including, but not limited to, the receptacle and cords is known as " ______". A: shore power B: ship power C: a marina service D: dock power
B: 14 600.7(B)(7)(1)
Bonding conductors used for the bonding connections of the noncurrent-carrying metal parts of signs shall not be smaller than _____ AWG. A: 8 B: 14 C: 6 D: 12
B: shore 90.2(A)(5)
Installations supplying _____ power to ships and watercraft in marinas and boatyards are covered by the NEC. A: auxiliary B: shore C: secondary D: primary
D: set-screws 502.130(A)(3)
Pendant luminaires installed in Class II, Division 1 locations shall be suspended by threaded RMC or steel IMC conduit stems, by chains with approved fittings, or by other approved fittings, or by other approved means. Stems shall be provided with _____ or other effective means to prevent loosening. A: welded joints B: explosion proof flex C: expansion joints D: set-screws
A: service lateral Article 100 "Service Lateral"
The underground conductors between the utility electric supply system and the service point are known as the "_______". A: service lateral B: main service conductors C: utility service D: service drop
C: dusttight 503.10(A)(2)
Boxes and fittings shall be _____ where installed in a Class III location. A: dust-ignition proof B: explosion proof C: dusttight D: weather proof
B: 110.26(E) 110.26(E) Dedicated Equipment space 110.26(E)(2) outdoor
All switchboards, switchgear, panelboards, and motor control centers shall be located in dedicated spaces and protected from damage and the working clearance space for outdoor installations shall include the zone described in _______. A: 110.26(D) B: 110.26(E) C: 110.26(C) D: 110.26(A)
D: Class I, Division 2 500.5(B)(2)
An area that is adjacent to a Class I, Division 1 location, and to which ignitable concentrations of flammable gasses, flammable liquid-produced vapors, or combustible liquid-produced vapors above their flash points might occasionally be communicated is a _______ location. A: Class II, Division 2 B: Class II, Division 1 C: Class I, Division 1 D: Class I, Division 2
D: the environment involved 725.25
Class 2 cables identified for future use shall be marked with a tag of sufficient durability to withstand _______. A: temperature fluctuations B: moisture C: humidity D: the environment involved
B: easily ignitable fibers or materials producing combustible flyings 500.5(D)
Class III locations are those that are hazardous because of the presence of ______. A: flammable liquids or gasses B: easily ignitable fibers or materials producing combustible flyings C: combustible dust D: flammable gasses or vapors
D: 60 A 625.43
For electric vehicle equipment rated more than ____ or more than 150 volts-to-ground, the disconnecting means shall be provided and installed in a readily accessible location. A: 30 A B: 50 A C: 20 A D: 60 A
B: service drops and laterals 90.2(B)(5)(a)
The Code does not cover installations under the exclusive control of an electrical utility such as ________. A: electric utility office buildings B: service drops and laterals C: electric utility garages D: electric utility warehouses
A: any of these 422.5(B)
The GFCI required for appliances shall be readily accessible, listed, and located ______. A: any of these B: in a device or outlet within the supply circuit C: in an integral part of the attachment plug D: with the branch circuit overcurrent device
A: authority having jurisdiction 90.4
The _____ has the responsibility for deciding on the approval of equipment and materials. A: authority having jurisdiction B: manufacturer C: testing agency D: the owner of the premises
B: 8 ft 300.5(D)(1)
Where direct-buried conductors and cables emerge from grade, they shall be protected by enclosures or raceways to a point at least ____ above finished grade. A: 6 ft B: 8 ft C: 3 ft D: 10 ft
C: 6 690.31(B)(2)
Where the conductors of more than one PV system occupy the same junction box or raceway with removable cover(s), the ac and dc conductors of each system shall be grouped separately by cable ties or similar means at least once, and then shall be grouped at intervals not to exceed _____ feet. A: 3 B: 1 C: 6 D: 10
A: equipment bonding jumper 250.146
A(n) ______ shall be used to connect the grounding terminal of a grounding-type receptacle to a grounded box. A: equipment bonding jumper B: equipment bonding jumper or grounded conductor jumper C: equipment bonding jumper and grounded conductor jumper D: grounded conductor jumper
B: explosive 480.10(A)
Provisions appropriate to the storage battery technology shall be made for sufficient diffusion and ventilation of gasses from the battery, if present, to prevent the accumulation of a(an) ______ mixture. A: chemical B: explosive C: noxious D: toxic
