NEC

IMC shall be secured ______. A. By fastening with 3 ft of each outlet box, junction box, device box, cabinet, conduit body, or other conduit termination B. Within 5 ft of a box or termination fitting when structural members do not readily permit the raceway to be secured within 3 ft of the termination C. Except when the IMC is within 3 ft of the service head for an above-the-food termination of a mast D. Any of these

D. Any of these

The minimum radius of a field bend on trade size 1 1/4 RMC is ______ in. A. 7 B. 8 C. 10 D. 14

B. 8

Where Harte electrical equipment containing over current devices, rated at least ____ or more, is installed in a equipment room, personnel door(S) located less that 25 feet from the nearest edge of the working space must open the direction of egress and have listed panic hardware. A. 600 A B. 800 A C. 1000 A D. 2000 A

B. 800 A 110.26(C)(3)

Duct heater controller equipment shall brace a disconnection manes installed within ______ the controller except as allowed by 424.19(A). A. 25 ft of B. Sight from C. The side of D. None of these

B. Sight from 425.65

In industrial establishments, were sizes 1/0 AWG through 4/0 AWG single conductor cables are installed in ladder type cable tray, the maximum allowable running spacing for the cable tray. A. 6 inches B. 9 inches C. 12 inches D. 15 inches

9 inches 392.10(B)(1)(a)

The voltage drop on technical power systems for sensitive electron equipment shall not exceed ______ percent for branch circuits. A. 1.50 B. 2 C. 2.50 D. 2.80

A. 1.50 647.4(D)

The maximum required distance between trade size 1 in rigid metal conduit supports is ______. A. 16 ft B. 10 ft C. 12 ft D. 8 ft

A. 16 ft Table 344.30(B)(2)

Luminaries Mounties in walls of permanently installed swimming pools shall be installed with the top of the luminaire lens not less that ______ below the normal water level of the pool, unless the luminaire is listed and identified for use at lesser depths. A. 18 in B. 6 in C. 24 in D 12 in

A. 18 in 680.23(A)(5)

Unless specifically identified for a higher percentage of fill,, the cross-sectional are of the sonductors inn a conduit seal shall not exceed ______ of the cross-sectional area of a rigid metal nondairy of the same trade size. A. 25% B. 40% C. 50% D. 60%

A. 25% 501.15(C)(6)

For bathtub and shower areas, no parts of cord-connected luminaries, lighting track or sealing-suspended (paddle) fans shall be located i thin a zone measured _______ horizontally from the top of the bathtub rim or shower stall threshold. A. 3 feet B. 4 feet C. 6 feet D. 8 feet

A. 3 feet 410.10(D)

A separate disconnection means shall be installed where capacitor is connected on the load side of a motor controller. A. True B. False

(B) False 460.8(C)Ex

In indoor areas where walls are frequently washed, such as laundries or car washed, metallic conduit and wet metallic panel boards shall be mounted with a ______ space between the wall and conduit or panelboard when the equipment is installed exposed. A. 3/4 in. B. 1/2 in. C. 1/8 in. D. 1/4 in.

1/4 in. 300.6 (D)

What is the minimum size wire-type equipment grounding conductor required for a 5 hp, 3-phase, 208-volt motor having 20 ampere rated overload protection and branch-circuit, short-circuit and ground-fault protection rated 30 amperes? A. 10 AWG B. 14 AWG C. 12 AWG D. 8 AWG

10 AWG 250.122

What is the required size copper equipment grounding conductor for a 50-ampere rated branch circuit where the conductors are installed it PVC conduit? A. 12 AWG B. 10 AWG C. 8 AWG D. 6 AWG

10 AWG 250.122

Disregarding exceptions, all 3-phase, 4-wire, 480/277-volt, electrical services, require ground-fault protection for each service disconnection means, when gated for at least ______ or more. A. 400 amperes B. 600 amperes C. 1000 amperes D. 1500 amperes

1000 Amperes 230.95

Determine the ampacity of four (4) size 1/0 AWG THW copper current=carrying conductors installed in a common raceway which a ambient temperature of 86 degrees F. A 150 amperes B. 105 amperes C. 112 amperes D. 120 amperes

120 A Table 310.15 (B) (16) Table 310.15 (B) (3) (a)

A branch circuit served by size 12 AWG conductors is a ______ rated branch circuit when protected by a 15-amperes circuit breaker. A. 20 ampere B. 25 ampere C. 15 ampere D. 10 ampere

15 ampere 210.18

When calculating the total load for a building or structure, what is the minimum computed branch circuit load, in volt-ample, permitted by the NEC for a branch circuit serving an exterior continuous-duty electric sign? A. 1200 Volt-amps B. 1800 volt-amps C. 1500 volt-amps D. 2000 colt-amps

1500 volt-amps 220.14 (f)

In new installations, the minimum clear working space the NEC requires between a 480Y/277-volt, switchboard and a 480-volt motor control chanter when facing each other is ______

4 feet 110.26 (A) (1) 151-600 x Condition 3 = 4 ft

In dwelling units, GFCI protection is required for all 15-and 20-amperes, 125-volt receptacles located which at least ____ of the outside edge of a bathtub or shower stall. A. 4 feet B. 6 feet C. 8 feet D. 10 feet

6 feet 210.8(A)(9)

Where multiple driven ground rods are installed at a service, they shall be spaced NOT than _____ apart. A. 2 feet B. 4 feet C. 6 feet D. 8 feet

6 feet 250.53 (B)

The NEC mandates the maximum length permitted for a flexible cord supplying a 208-volt, single-phase, room air-conditioner to be _______. A. 4 feet B. 6 feet C. 8 feet D. 10 feet

6 feet 440.64

When installling wiring for sensitive electronic equipment, the maximum woltage to ground is required to be _______. A. 277 volts B. 120 volts C. 60 volts D. 30 volts

60 volts 647.1

What minimum size 75 C copper feeder conductors are required to supply the following group of 3-phase, 230 V motors? One 15 hp wound-rotor One 7.5 hp induction-type One 3 hp induction-type A. 4 AWG THWN B. 4 AWG THHN C. 3 AWG THW D. 2 AWG THW

A. 4 AWG THWN 42 x 1.25 = 52.2 A 22 x 1.00 = 22 A 9.6 x 1.00 = 9.6 A Total = 84.7 A -> 85 A

Conductors smaller than 8 AWG for open wiring on insulation shall be rigidly suppered within _____ in of a tap or splice. A. 6 B. 8 C. 10 D. 12

A. 6 398.30(A)(1)

A single-phase, 120/240-volt, 18kW rated home standby generator has a full-load current rating of _______. A. 75 A B. 87 A C. 100 A D. 150 A

A. 75 A 18,000/240 = 75 A

The power supply to contact conductors of a crane in Class III locations shall ____. A. Be electrically isolated form all other systems B. Be equipped with a acceptable ground detectors. C. Give an alarm in the case of a ground fault D. All of these

A. Be electrically isolated from all other systems 503.155(A)

Cablebus framework that is _____ shall be permitted as the equipment grounding conductor for branch circuits and feeders. A. Bonded B. Welded C. Protected D. Galvanized

A. Bonded 370.61(1)

Barriers shall be placed in all service panelborards, switchboards, and switchgear such that no uninsulated, ungrounded service ______ or service terminal is exposed to inadvertent contact by persons or maintenance equipment while servicing load terminations. A. Bus bar B. Conductors C. Cables D. None of these

A. Busbar 408.3(A)(2)

A type of fuse not permitted for new installations and shall e used only for replacements inn existing installations is a/an _______ fuse. A. Edison-base B. Class K C. Class CC D. Time-delay

A. Edison-base 240.51(B)

Where conduits are used as service masts, hubs shall be ________ for use with service-entrance equipment. A. Identified B. Approved C. Of a heavy-duty type D. Listed

A. Identified 230.28(A)

Intrinsically safe apparatus, associated apparatus, and other equipment shall be installed _______, unless the equipment is a simple apparatus that does not interconnect intrinsically safe circuits. A. In accordance with the control drawings B. In the electrical equipment room C. In a backboard of at least 3/4 in thick plywood D. In a dedicated enclosure

A. In accordance with the control drawings 504.10(A)

As a general rule, switches or circuit breaker shall ________. A. Not disconnect the grounded conductor of a circuit B. Be marked by means of a printed tag C. Be of the externally operable type D. Disconnect the grounded conductor of a circuit

A. Not disconnect the grounded conductor of a circuit 404.2(B)

A building or structure shall be supplied by a maximum of ______ service, unless specifically permitted otherwise. A. One B. Two C. Three D. As many as desired

A. One 230.2

A point on a wiring system at which surrender is taken to supply luminaries, appliances, heaters, motors, and similar current-consuming equipment to considered. A. Outlet B. Service C. Receptacle D. Circuit breaker

A. Outlet 100

Cablebus is ordinarily assembled at the _______. A. Point of installation B. Manufacturer's location C. Distributor's location D. None of these

A. Point of installation 370.2 note

A premises wiring system supplied by a grounded ac electrical service, shall have a grounding electrode conductor connected to _______. A. the grounded service conductor B. The service disconnect enclosure C. The equipment grounding conductor D. The meter socket enclosure

A. The grounded service conductor 250.24(A)

Where a mobile home has the main service disconnection means installed outdoors, the disconnecting means shall be installed to the bottom of the enclosure is not less than ____. A. Two feet B. Three feet C. Four feet D. Six feet

A. Two feet 550.32(F)

Where solid knobs are uses for concealed knob-and-tube wiring conductors shall e securely tied to them by ______ equivalent that of the conductor. A. The wires having insulation B. Conductors having an AWG C. Nonconductive material D. None of these

A. Tie wires having insulation 394.30(B)

Some cleaning and lubricants compounds can cause severe deterioration of many plastic materials used for insulation and structural application in equipment. A. True B. False

A. True 110.11 Note 2

Metal in ground support structures permitted as grounding electrodes include, but are not limited to, piling, casings, and other structural metal. A. True B. False

A. True 250.52(A)(2) Note

Where NUCC enters a box, fitting, or other enclosure, a bushing or adapter shall be provided to protect the conductor or cable from abrasion unless the design of the box, fitting, or enclosure provides equivalent protection. A. True B. False

A. True 354.46

A nonmetallic surface raceway is a nonmetallic raceway tat is intended to be mounted to the surface to a structure, with associated couplings, boxes, and fitting for the installation of electrical conductors. A. True B. False

A. True 388.2

Receptacles or their cover plates, supplied from the life safety equipment branches in nursing homes shall have a distinctive color or marking so as it be readily identifiable. A. True B. False

A. True 517.42(E)

For other than submersible types of motors, they shall be located s that adequate ______ is provided and so they maintenance, such as lubrication of bearings and replacing of brushes, can be readily accomplished. A. Ventilation B. Spacing C. Air-flow D. Dimensions

A. Ventilation 430.14(A)

A recessed luminaire not identified for contact with insulation shall have all recessed parts spaced not less than _______ in front combustible materials, except for points of support. A. 1/4 B. 1/2 C. 1 1/4 D. 6

B. 1/2 410.116(A)(1)

In reward to new outdoor installations of permanently installed swimming pools, luminaries installed above the pool or within 5 feet horizontally from the inside wall of the pol, shall be installed at a height off not less than ______ above the maximum water level of the pool. A. 10 feet B. 12 feet C. 15 feet D. 8 feet

B. 12 feet 680.22(B)(1)

In addition to the number of 120-volt, single phase branch circuits required in other areas of a dwelling, at least one additional ________ branch circuit shall be provided to supply the laundry outlet in the laundry room. A. 15 A B. 20 A C. 25 A D. 30 A

B. 20 A 210.11(C)(2)

Each doorway leading into a transformer vault from the building interior shall be provided with a tight fitting door having a minimum fire rating of ________ hours. A. 2 B. 3 C. 4 D. 6

B. 3 450.43(A)

A minimum working space depth of _________ ft to live parts fo equipment operation at 277 Volts to ground is required where there are exposed live parts on one side and no live air grounded parts on the other side. A. 2 B. 3 C. 4 D. 6

B. 3 Table 110.26(A)(1) and Condition 1

Shore power for boats shall be provided by single "twist-lock" receptacles rated not less than _______. A. 20 A B. 30 A C. 50 A D. 60 A

B. 30 A 555.33(A)(4)

Mobile home service equipment shall be located in sight from and not more than _________ from the exterior wall of the mobile home it serves. A. 25 feet B. 30 feet C. 50 feet D. 100 feet

B. 30 feet 550.32(A)

Where the NEC specifies that one equipment shall be within sight of another equipnent, the specified equipment is the be wishbone and not more than _______. A. 100 feet B. 50 feet C. 10 feet D. 25 feet

B. 50 feet 100

An insulated grounded conductor ______ AWG or smaller shall be identified by a continuous white or gray outer finish, or gray outer finish, or by three continuous white or gray stripes along its entire length on other than green insulation. A. 8 B. 6 C. 4 D. 3

B. 6 200.6(B)

The maximum unsupported length of type MC cable used to supply a luminaire in an accessible ceiling in permitted to be not more that _______ in length. A. 10 ft B. 6 ft C. 4.5 ft D. 18 in

B. 6 ft 330.30(D)

Article 647 covers the installation and wiring of separately derived systems that operate at ______ volts to ground and _______ volts line-to-line for sensitive electronic equipment. A. 30, 60 B. 60, 120 C. 120, 120 D. 120, 240

B. 60, 120 647.1

Color coding shall be permitted to identify intrinsically safe conductors were they are colored light ______ and where no other conductors colored light ________ are used. A. Red B. Blue C. Yellow D. Any of these

B. Blue 504.80(C)

Where equipment grounding is required for an installation of HDPE, a separate equipment grounding conductor shall be ______. A. An insulated copper conductor B. Installed within the conduit C. A stranded bare copper conductor D. A cold bare copper conductor

B. Installed with the conduit 353.60

Where it is unlikely that two or more non-coincident loads will be in use simultaneously, only the _______ the loads used at one time is required to be used in computing the total load to a feeder. A. Smaller of B. Largest of C. Difference between D. None of these

B. Largest of 220.60

If the motor control curium transformer is located in the controlled enclosure, the transformer shall be connected to the _______ side of the control circuit disconnection means. A. Line B. Load C. Adjacent D. None of these

B. Load 430.75(B)

when a industrial control panel is supplied from a 3-phase, 4-wire, delta-connected electrical system, the phase having the higher voltage to ground is ______. A. Required to be the "A" phase B. Required to be the "B" phase C. Required to be the "C" phase D. Permitted to be any phase

B. Required to be the "B" phase 409.102(B)

The connection between the grounded circuit conductor and the supply-side bonding jumper or equipment grounding conductor, or both, at a ______ is called a "system bonding jumper". A. Service disconnect B. Separately derived system C. Motor control center D. Separate building or structure disconnect.

B. Separately derived system 100

When a retail furniture store has 80 continuous linear feet of display show window,, the NEC mandates a least _______ 125-Volt, single-phase 15 or 20 A rated receptacle outlets shall be provided within 18 inches of the top of the show window for the show window lighting. A. Six B. Seven C. Eight D. Nine

B. Seven 210.62

Additional services shall be permitted for a single building or other structure sufficiently large to make two or sore services necessary if permitted by _______. A. The registered design professional B. Special permission C. The engineer of record D. Master electricians

B. Special permission 230.2(C)(3)

Where single-conductor Type MI cables are used, all phase conductors and, when used, the _____ conductor, shall be grouped together to minimize induced voltage on the sheath. A. Larger B. Neutral C. Grounding D. Largest

B. neutral 322.31

In a straight Ron of rigid type PVC conduit, expansion fittings are to be provided to compensate for thermal expansion and contraction where the length change is expected to be at least _______ or greater. A. 1/2 in B. 3/8 in C. 1/4 in D. 3/4 in

C. 1/4 in 352.44

Low-voltage lighting systems shall be installed not less than _____ ft horizontally from the nearest edge of the water in pools, spas, fountains, of similar locations, in less permitted by Article 680. A. 5 B. 6 C. 10 D. 20

C. 10 411.5(B)

Branch-curcuit conductors supplying a fixed storage-type electric water heater with a capacity of 120 gallons or less, shall have a ampacity of not less that _______ of the full-load current of the water heater. A. 80 % B. 100 % C. 125 % D. 150 %

C. 125% 422.10(A) + 13

A total of ten (10) copper THW conductors are to be installed in a 20-foot run of intermediate metal conduit (IMC), five (5) size 1 AWG and five (5) size 3 AWG. What is the minimum allowable trade size IMC required to contain these ten (10) conductors? A. 1 1/2 in B. 2 in C. 2 1/2 in D. 3 in

C. 2 1/2 Chapter 9 Table 4+5

Where transformer vaults are not protected with an automatic fire-suppression system, they shall be constructed of materials that have a minimum fire-resistance rating of ______. A. 1 hour B. 3 hours C. 3 hours D. 4 hours

C. 3 hours 430.42

When sizing a feeder for the sixes appliance loads in dwelling units, a demand factor for 75% of the total same plate ratings con be supplied if there are _______ or more appliances fastened in places on the same feeder. A. 2 B. 3 C. 4 D. 5

C. 4 220.53

The required working space for access to live parts of equipment operation at 300 volts to ground, where there are exposed live parts on both sides of the workspace is ______ ft. A. 3 B. 3.5 C. 4 D. 4.5

C. 4 Table 110.26.(A)(1) and Condition 3

A mobile hoe that is factory equipped with gas or oil-fired control halting equipment and cooking appliances can be provided with a listed mobile home power-supply cord rated ______. A. 30 A B. 35 A C. 40 A D. 50 A

C. 40 A 550.10(A) Ex 1

Determine the ampacity of a e-conductor size 6 AWG XHHW aluminum SER cable installed i the attic of a one-family dwelling where the ambient temperature is 110 degrees F. A. 41.2 A B. 52.2 A C. 47.9 A D. 56.2 A

C. 47.9 A 55A x 0.87 = 47.85 A Table 310.4(A) Table 310.16 (2020) Table 310.15.(B)(1)

Within the vicinity of aircraft in an aircraft hangar, the area within 5 ft horizontally fro aircraft power plants or aircraft fuel tanks shall be classified as a class I, Divisions 2 or Jone 2 location tat extends upward from the floor to a level of _______ ft above that upper surface of wings and or engine enclosures. A. 2 B. 3 C. 5 D. 6

C. 5 513.3(C)(1)

Where a submersible pump is located in a pond of a water treatment plant, the on land service equipment for the pump shall be no closer than _____ horizontally from the shoreline. A. 6 ft B. 10 ft C. 5 ft D. 3 ft

C. 5 ft 682.11

Equipment supplied by class I circuits such as fire alarm, control, and signaling circuits shall be grounded, unless operation at lass than _______. A. 25 V B. 120 V C. 50 V D. 150 V

C. 50 V 250.112(1)

When used outdoor and ambient operators is not a factor, size 6/3 w/g Type UF cable has an ampacity of ______. A. 65 A B. 60 A C. 55 A D. 50 A

C. 55 A 334.80 and Table 310.16 (2020)

Cleat-type lamp holders located at least ______ ft above the floor can have exposed terminals. A. 3 B. 6 C. 8 D. 10

C. 8 410.5 Ex

Attachment plugs and receptacles inn Class. Locations of aircraft hangers shall be _______. A. Identified for use in Class I locations B. Designed so that they cannot be energized while the connections are being made or broken C. A or b D. None of these

C. A or B 513.4(A)

Te distribution point is an electrical supply point from which __________ to agricultural buildings or structures under single management are supplied. A. Service drops or service conductors B. Feeders or branch circuits C. A or B D. None of these

C. A or B 547.2

A reliable conductor that endures electrical conductivity between metal parts of the electrical installation that are required to be electrically connected is called a(n) "_______". A. Grounding electrode B. Auxiliary ground C. Bonding conductor or jumper D. Tap conductor

C. Bonding conductor or jumper 100

In general, when current-carrying conductors are installed in parallel, the paralleled conductors in each phase shall ________. I. Be the same size inn circular mil area II. Have the same insulation type A. I only B. II only C. Both I and II D. Neither I nor II

C. Both I and II 310.10(G)(2) - (4)

The metallic sheath of metal-clad cable shall be continuous and ______. A. Flame-retardant B. Weatherproof C. Close fitting D. All of these

C. Close fitting 330.116

The accessible portion of abandoned supply circuits and interconnection cables located in an information technology equipment rom shall be removed, unless ________. A. Tagged and identified as abandoned B. Identified as type CMP C. Contained in a raceway D. Disconnected from their supply source

C. Contained in a raceway 645.5(G)

The installed conductive path(s) that provide(s) a ground-fault current path and connects normally no current-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both, is known as a(n) "_______ conductor". A. Grounding electrode B. Grounding C. Equipment grounding D. None of these

C. Equipment grounding (EGC) 100

Type AC cable shall provide an adequate path for _______. A. Water drainage B. A grounding electrode C. Fault-current D. Grounding conductors

C. Fault-current 320.108

The minimum number of 120-volt, 15-ampere, general lighting branch circuits required for a dwelling with 70 feet by 30 feet of livable space is _______. A. Two B. Three C. Four D. Five

C. Four 70 x 30 x 3 / (120 x 15) = 3.5 up ^ 4

Ballasts for fluorescent lighting installed indoors shall have _______ protection. A. AFCI B. Supplementary C. Integral thermal D. None of these

C. Integral thermal 410.130(E)(1)

Receptacles of dc plugging boxes shall be rated at not ______ when used on a stage or set of a motion picture studio. A. More than 30 A B. Less than 20 A C. Less that 30 A D. More than 20 A

C. Less than 30 A 530.14

In compliance with the rules set forth by the NEC, conductors with type _______ insulation are not permitted for use in wet locations such as, where installed underground in a conduit or outdoors exposed to the weather. A. TW B. THWN C. THHN D. XHHW

C. THHN 300.5(B)

Where cord-and-plug connected appliances are likely to be used simultaneously, each ________ or fraction thereof of fixed multi outlet assemblies used in other than dwelling units, shall be considered as an outlet of not less than 180 volt-amperes. A. 24 in B. 6 in C. 48 in D. 12 in

D. 12 in 220.14(H)(2)

When driving a ground rod and solid rock is encountered, the ground rod is permitted to be buried in a trench at least _____ deep. A. 3 feet B. 4 feet C. 24 in D. 30 in

D. 30 in 250.53(A)(4)

Conductors that supply one or more resistance welders shall be protected by a overcurrent device rated or set at not more than _______ percent of the conductor ampacity. A. 80 B. 100 C. 125 D. 300

D. 300 630.32.(B)

Floor-mounted flat conductor cable and fittings shall be covered with carpet squares no larger than ______. A. 24 in. Sq. B. 30 in. Sq. C. 36 in. Sq. D. 39.37 in. Sq.

D. 39.37 in. Sq. 324.41

Single grounding the receptacles, with GFCI protection that provide power for water pump circulation motors of permanently installed swimming pools shale he located at least _______ from the inside walls of the pool. A. 5 ft B. 10 ft C. 20 ft D. 6 ft

D. 6 ft 680.22(A)(2)

Small gage conductors such as a single size 16 AWG conductor is permitted to carry continuous loads up to ________, as long as the conductor is protected by a fuse or circuit breaker. A. 20 A B. 15 A C. 12 A D. 8 A

D. 8 A 240.4(D)(2)(1)

Where a transformer is installed to supply a 243 ampere, 208 volt, 3 phase load the transformer must have a kVA rating of at least ______. A. 300 kVA B. 150 kVA C. 112.5 kVA D. 90 kVA

D. 90 kVA 300.5

All switchboards, panelboard, and motor control centers shall be _______. A. Located in dedicated spaces B. Protected from damage C. In weatherproof D. A and B

D. A and B 110.26(E)

PVC conduit and fitting for use above around shall be ______. A. Flame retardant B. Resistant to low temperatures and sunlight C. Resistant to distortion from heat D. All of these

D. All of these 352.100

Article 551 covers combination electrical systems, generator installations, and ______, nominal, systems. A. 120 V B. 120/208 V C. 120/240 V D. All of these

D. All of these 551.4(B)

Flat conductors cable shall not be installed in ______. A. Residential buildings B. School building other that administrative office areas C. Hospital buildings other that administrative office areas D. Any of these

D. Any of these 324.12

The fixed wiring methods permitted is theaters, audience area of motion picture and television studios, performance areas, a similar locations are ______. A. Any metal raceway B. Nonmetallic raceways encased in 2 in of concrete C. Type MC or AC cable containing an insulated equipment grounded conductor D. Any of these

D. Any of these 520.5(A)

Where rigid metal conduit (RMC) or intermediate metal conduit (IMC) is threaded in the field where corrosion protection is necessary, the threads shall be coated with a/an ________ compound. A. Oil and tar based B. Judged suitable corrosion resistant C. Corrosion-proof D. Approved electrically conductive, corrosion-resistant

D. Approved electrically conductive, corrosion-resistant 300.6(A)

What is the minimum slumber of 120-V, 20-A, single space branch-circuits that must be provided to supply receptacle outlets in dwelling units? A. Two B. Three C. Four D. Five

D. Five 210.11(C)(1)-(4)

When splicing existing underground service conductors to extend to a new service location, the NEC requires _____. I. The use of splice boxes II. The conductors to be protected with a covering of at least two (2) inches of concrete A. I only B. II only C. Either I or II D. Neither I nor II

D. Neither I nor II 300.5(E)

A strut-type channel raceway shall not be installed _______. A. In concealed locations B. Where subject to corrosive influences, if enamel is the only protection from corrosion of ferrous channel raceways and fittings C. A or B D. None of these

D. None of these 384.12

Which of the following is not required to be marked on the nameplate of a transformer? A. KVA rating B. Manufacturer C. Voltage D. Overcurrent protection

D. Overcurrent protection 450.11(A)

Where flexible cord is used as the wiring method to supply ac motors, the minimum size of the conductors shell be selected in accordance with _______ of the NEC. A. Table 310.16 B. Table 310.17 C. Table 310.16 D. Section 400.5

D. Section 400.5 430.6

Which of the following shall be permitted in the dedicated electrical space above an panelboard? A. Air-conditioning ducts B. Leak protection C. Piping D. Sprinkler protection

D. Sprinkler protection 110.26(E)(1)(c)

Article 200 provides the requirements for _______. A. Identification of terminals B. Grounded conductors in premises wiring systems C. Identification of grounded conductors. D. All of these

D. all of these 200.1

Where an ac system operating at less than 1000 volts is s rounded at any point at the service, a main bounding jumper shall connect the grounded conductors to _______. A. Each service disconnection weans enclosure B. Each meter base only C. The grounding electrode D. All sub-panels

Each service disconnecting means enclosure 250.24(C)

Where the motor controller also serves as a disconnection means, it shall open all _____ conductors to the motor. A. Grounded B. Neutral C. Grounding D. Ungrounded

Ungrounded 430.84 Exception

Where ventilation marking is not required, the electric vehicle supply equipment shall be clearly field marked, that "Ventilation in not required". A. True B. False

b. False 625.15(B)

Where more than one motor disconnecting means is provided in the same motor branch circuit, at least one of the disconnection means shall be readily accessible. A. True B. False

A. True 430.107

Receptacles rated _____ or less and designed for the dire connection of aluminum conductors shall be listed and mark CO/ALR. A. 15A B. 20A C. 25A D. 30A

B. 20A

Joints between lengths of ENT, couplings, fittings, and boxes shall be made by ______. A. A qualified person B. Set screw fittings C. An approved method D. Exothermic welding

C. An approved method

For the purpose of determining conductor fill in a device box, a three-way toffee switch is counted as equal to ______ connductor(s), based in the lard=test conductor connected to the switch. A. Zero B. One C. Two D. Three

Two 314.16 (B) (4)

Type MC cable installed horizontally through wooden or metal framing members are considered secured and supported where such support does not exceed _______-ft intervals. A. 3 B. 4 C. 6 D. 8

C. 6

The NEC considers the area around the outdoor motor fuel dispensing stumps of an automotive service station to be hazardous location. This area extends a height of 18 in about grade, and up to a horizontal distance of ______ from the enclosure of the outdoor motor fuel dispensing pumps. A. 5 feet B. 10 feet C. 16 feet D. 20 feet

D. 20 feet Table 514.3(B)(1)

Branch-circuit conductors supplying more that one other shall have a ampacity of at least ______ of the FLC of the highest rated motor is the group, and 100 percent of the FLC of the other motor on the group. A. 25 percent B. 80 percent C. 100 percent D. 125 percent

125 percent 430.24(1)

Nongrounding, no locking-type, 15A and 20A, 125V and 250V receptacles used for replacements is a dwelling unit shall not be required to be listed as lampler resistant. A. True B. False

A. True 406.12 Ex 1-7 + 4

For enclosing a mobile home supply cord, what is e maximum trade size conduit permitted between the branch circuit panelboard of a mobile home and the underside of a mobile home floor? A. 1 in B. 1 1/4 in C. 1 1/2 in D. 2 in

B. 1 1/4 in 550.10(G)

Where a motor of more than 1 horsepower has a temperature rise of 50 C indicated on the nameplate, for the purposes of selecting the overload device, this device shall be selected to trip at no more than ______ of the motor's full-load ampere rating. (Assume modification of this value is not necessary.) A. 100 % B. 115 % C. 125 % D. 130 %

B. 115 % 430.32(A)(1)

Enclosures in a Class I, Division I location containing components that have arcing devices must have a approved conduit seal located within at least ______ of each conduit Ron entering or leaving such enclosures. A. 12 in B. 18 in C. 24 in D. 4.5 in

B. 18 in 501.15(A)(1)

Where an office building I has a 208Y/120 volt, 3 phase service with a balanced net computed load of 90 kVA, what is the current each ungrounded (phase) conductor will carry at full load? A. 188 A B. 250 A C. 433 A D. 750 A

B. 250 A A = 90 kVA / (208 v x 1.73)

Branch-circuit conductors within ______ in of a balllast shal have an insulation temperature rating not lower that 90 C (194 F). A. 1 B. 3 C. 6 D. 8

B. 3 410.68

The disconnection means for a motor controller shall be designed so that it cannot ________ automatically. A. Open B. close C. restart D. Shut down

B. Close 430.103

A ______ disconnection means is required within sight of the storage battery for the ungrounded stationary battery system conductors operation at over 60V dc. A. Accessible B. Readily accessible C. Safety D. All of these

B. Readily accessible 450.7(A)

According to the national electrical code, what are the three separate ranches of the essential electrical systems for hospitals? A. The emergency branch, life safety branch and the standby branch. B. The life safety branch, equipment branch and the critical branch. C. The normal branch, life safety branch and the alternate branch. D. The essential branch, the emergency branch and the equipment branch.

B. The life safety branch, equipment branch and the critical branch. 517.31(A)

A disconnection means shall be provided on the supply side of all fuses in circuits having a voltage of a least ______ to ground so that each circuit containing fuses can be independently disconnected from the source for power. A. 120 v B. 250 v C. 150 v D. 277 v

C. 150 v 240.40

Flexible cords and flexible cables shall be protected by ______ where passing through poles in covers, other boxes, or similar enclosures. A. Bushings B. Fittings C. A or B D. None of these

C. A or B

Type UF cable is not permitted to the used _____. A. In the attic space B. as a substitute for Type C. As service-entrance cable D. For solar photovoltaic systems

C. As service-entrance cable 340.12(1)

Bends in PVC conduit shall ______ between pull points. A. Not be made B. Not be limited in degrees C. Be limited to 360 degrees D. Be limited to 180 degrees

C. Be limited to 360 degrees

An attachment plug and receptacles can serve as the disconnection means for a single-phase room air conditioner rated 250V or less if ______. A. The manual controls on the room air conditioner are readily accessible and located within 6 ft of the floor B. An approved manually operable disconnecting means is installed if a res daily accessible location within sight from the room air conditioner C. A or B D. A and B

D. A and B 440.63

Materials such an straps, bolts, screws, and so forth, which are associated with the installation of IMC in wet locations shall be ______. A. Weatherproof B. Protected against corrosion by corrosion-resistant materials C. Corrosion resistant D. B or C

D. B or C

Materials such as straps, bolts, and so forth, associated with the installation of RMC in wet locations shall be ______. A. Weatherproof B. Protected against corrosion by corrosion-resistant materials C. Corrosion resistant D. B or C

D. B or C

Horizontal runs of RMC supported by openings through ______ at intervals not exceeding 10 ft and securely fastened within 3 ft of termination points shall be permitted. A. Walls B. Trusses C. Rafters D. Framing members

D. Framing members

Which of the following wiring wet holds is/are approved for use for fixed wiring in an area above Class I locations in a commercial repair garage? A. Type MI cable B. Type Ic cable C. Type MC cable D. All of the above

D. all of the above 511.7(A)(1)

Grounding electrodes made of pipe or conduit shall not be smaller than ______ electrical trade size. A. 1/2 in. B. 3/4 n C. 1 in. D. 1 1/2 in.

3/4 in. 250.52(A)(5)(a)

When installing pendant mounted luminaries, the pendant conductors longer than ________ shall be twisted together where colt called is a listed assembly. A. 18 inches B. 24 inches C. 30 inches D. 36 inches

36 inches 410.54(C)

Where a trade size 1/2 in. Rigid metal conduit (RMC) is installed I a Class I location and a 1/2 in. Conduit seal is required the minimum thickness if the sealing compound shall NOT be less than ______. A. 3/8 in. B. 1/2 in. C. 5/8 in. D. 3/4 in

5/8 in. 501.15(C)(3)

What maximum percent of a metal wore way cross-section ma be occupied by splices, that's and conductors at any point? A. 20 percent B. 30 percent C. 40 percent D. 75 percent

75 percent 376.56(A)

What is the maximum length of a flexible cord that way be used for a recirculating water-pump motor on a swimming pool at a dwelling? A. 3 feet B. 4 feet C. 6 feet D. 8 feet

A. 3 feet 680.21(A)(3)

Alternation-current or direct-current general-use snap switched ma be sued for control of inductive loads not exceeding _______ present of the ampere rating of the switch at the applied voltage. A. 50 B. 75 C. 90 D. 100

A. 50

Household-type appliances what surface heating element having a maximum demand of more than ______ shall have its power supply subdivided into two (2) or more circuits. A. 60 A B. 50 A C. 40 A D. 30 A

A. 60 A 422.11(B)

LFMC shall not be required to be secured or supported where fished between access points through _______ spaces in finished buildings or structures and supporting is impractical. A. Concealed B. Exposed C. Hazardous D. Completed

A. Concealed

General-use ______ switches shall be used only to control permanently installed incandescent luminaries unless listed for control of other loads and installed accordingly. A. Dimmer B. Fan speed control C. Timer D. All of these

A. Dimmer

Conductors installed in electrically heated floors in bathrooms, kitchens, and hydromassage bathtub locations chalk be provided with _____ protection. A. Ground-fault circuit interrupter (GFCI) B. Arc-fault circuiting interrupter (AFCI) C. Heat-detection circuit interrupter (HDCI) D. All the above

A. Ground-fault circuit interrupter (GFCI) 424.44(E)

For dwelling units, GFCI protection shall be provided for lighting outlets not exceeding 120 volts where installed in _______. I. Crawl spaces II. Bathrooms A. I only B. II only C. Both I and II D. Neither I nor II

A. I only 210.8(E)

Metal wireways can press transversely thought a wall _____ A. If the length passing through the wall is unbroken B. If te walll is of fire-rated construction C. In hazardous (classified) locations D. If the walll is not of fire-rated construction

A. If the length passing through the wall is unbroken

Type UF cable is permitted to be used for inside wiring. A. True B. False

A. True

Wiring and equipment supplied from storage arteries shall be in accordance with chapters 1 through 4 of the NEC unless otherwise permitted by 480.6 A. True B. False

A. True 480.5

A motor controller shall open all conductors to the motor where not used as a disconnection means. A. True B. False

B. False 430.84

When determining a Class 1, Division 2 location, the ______ is a factor that should be considered in determining the classification and extent of the location. A. Quantity of flammable material that might escape on space of a accident B. Adequacy of ventilation equipment C. Record of the industry of business with respect to explosions or fires D. All of these

D. All of these 500.5(B)(2) Note 1

The interior of enclosures or archways installed underground shall be considered to be a ______ location. A. Dry B. Damp C. Hazardous D. Wet

Wet 300.5 (B)

Metal wireways shall be permitted for _____. A. Exposed work B. Totally concealed work C. Wet locations if listed for the purpose D. A and C

D. A and C

Class II locations are those tat are hazardous because of the presence of ______. A. Flammable gas B. Ignitible fibers C. Ignitible vapors D. Combustible dust

D. Combustible dust 500.5(C)

What is the maximum number of time a wire-type grounding electrode conductor is permitted to be spliced by use of listed spelt-bolt connectors? A. One B. Two C. Three D. None

D. None 250.64(C)(1)

In a health care facility, a patient bed location is a critical care area (Category 1) is required to have which is the following? A. Four single receptacles or two duplex receptacles. B. Fourteen single receptacles or seven duplex receptacles. C. Six duplex receptacles or twelve single receptacles. D. Eight single receptacles or four duplex receptacles.

Fourteen single receptacles or seven duplex receptacles. 517.19(B)(1)

Fixture wires shall not be used for branch-circuit wiring, except as permitted in other articles of the code A. True B. False

A. True

PVC conduit shall be permitted for s posed work where subject to physical damage if identified for such use. A. True B. False

A. True

Running threads shall not be used on IMC for connection and couplings. A. True B. False

A. True

Snap switches rated ______ or less directly connected to aluminum conductors shall be listed and marked CO/ALR. A. 15 A B. 20 A C. 25 A B. 30 A

B. 20 A

Where a submersible pump is used in a metal well casing, the well casing shall be ____ the pump circuit equipment grounding conductor. A. Isolated from B. Connected to C. Exothermic welded to D. No of these

Connected to 250.112 (M)

Plate grounding electrodes shall be installed not less that ____ below the surface of the earth. A. 12 in B. 18 in C. 24 in D. 30 in

D. 30 in 250.53(A)(5)

Where an ac transformer arc welder has a 50 ampere rated primary current and 60 recent duty cycle, the minimum size 60 deg. C rated shopper conductor the NEC requires the supply this welder is _______. A. 6 AWG B. 8 AWG C. 10 AWG D. 4 AWG

8 AWG

Coves for luminaries shall be laoated so that the lamps a equipment can be properly installed and _________. A. Maintained B. Protected from physical damage C. Tested D. Inspected

A. Maintained

Open motors having commutators or collector rings shall located or protected so that sparks can or reach adjacent conbustible material. This shall not prohibit the installation these motors _______. A. On wooden floors B. Over conbustible fiber C. Under combustible material D. None of these

A. On wooden floors 430.14(B) Ex

For permanently connected appliances rated over ______, the branch-circuit switch or circuit breaker can serve as the disconnection means where the switch r circuit breaker can serve as the disconnection means where the switch or circuit breaker is within sight from the appliance, or is lockable in accordance with 110.25. A. 200 VA B. 300 VA C. 400 VA D. 500 VA

B. 300 VA 422.31(A)

Conductors rated at a temperature _______ than the listed lemperature rating fo PVC conduit shall be permitted to be installed in PVC conduit, provided the conductors are not spiraled at a temperature above the raceway's listed temperature rating. A. Lower B. The same as C. Higher D. A or B

C. Higher

Where a size 14 AWG branch-circuit conductor protected by a 15 A rated circuit breaker supplies three (3) 20 A rated duplex receptacles, this branch circuit _____. A. Would be in compliance with the NEC if the wire was size 12 AWG B. Would be inn compliance with the NEC if the breaker was rated. C. It not in compliance with the NEC because the receptacles have a 20 A rating. D. Is inn compliance with the NEC.

C. In not in compliance with the NEC because the receptacles have a 20 A rating. Table 210.21(B)(3)

Where an 80 A 240 V single share load is located 200 feet from a panelboard and is supplied with size 3 AWG copper conductors with THWN insulation, what is the approximate voltage-drop on the circuit? (K = 12.9) A. 6.0 v B. 4.0 v C. 9.2 v D. 7.84 v

D. 7.84 v VD = 2 x K x I x D / CM

For stationary motors of 3 hp or less and 300V or less on circuits, the controller can be an ac-rated only general-use sr switch where the motor full-load current rating is not more then _______ percent of the rating of the switch. A. 50 B. 60 C. 70 D. 80

D. 80 430.83(C)(2)

Cable trays shall be _______ except as permitted by 392.18(D). A. Exposed B. Accessible C. Concealed D. A and B

D. A and B

A multi outlet assembly shall not be installed _______. A. In hoistways B. Where subject to severe physical damage C. Where subject to corrosive vapors D. All of these

D. All of these

Hazardous (classified) locations shall be classified depending on the properties of the ______ that could be present, and the like hood that a flammable or combustible concentration or quantity is present. A. Flammable liquid-produced vapors B. Flammable gases C. Combustible dusts D. All of these

D. All of these 500.5(A)

The purpose f use f panelboard circuits and circuit _____ including spare positions, shall be legibly identified on a circuit directory located on the face or inside of the door of a panelboard, and at each switch or sir unit breaker is a switchboard or switchgear. A. Manufacturers B. Conductors C. Feeders D. Modifications

D. Modifications 408.4(A)

A disconnect switch enclosed installed in a Class II, Divistion 2, hazardous location in an industrial establishment shall be _____. A. Dusttight B. heavy-duty type C. Raintight D. General-duty type

Dusttight 502.10 (B) (2)

A class III Division _________ location is where easily ignitable fibers/flyings are stored or handled but not manufactured. A. 1 B. 2 C. 3 D. All of these

B. 2 500.5(D)(2)

________ is an unthreaded thin wall raceway of circular cross section designed for the routing and physical protection fo electrical conductors and cables when joined together with listed fittings. A. LFNC B. EMT C. NUCC D. RTRC

B. EMT

For nonshielded conductors of over 1000 wolfs, the conductors shall not ce bent to a radius of less than ________ times the overall inductor diameter. A. Six B. Eight C. Ten D. Twelve

B. Eight 300.34

Conductors larger than that for which the metal wireways is designed can be installed in an metal wireways. A. True B. False

B. False

Type UF cable can be used for service conductors. A. True B. False

B. False

Given: a metal junction box has a volume of 27 cubic inches and contains a total of six (6) size 12 AWG conductors, no grounding conductors, device or fittings are contained is the box. Additional wires of size 10 AWG need to be added in the box. What is the maximum number of size 10 AWG conductors may be added to this box? A. Two B. Five C. Six D. Eight

B. Five 27 - (2.25 x 6) = 13.5 13.5 / 2.5 - 5.4 -> 5 Table 314.16(B)

Appliances that have a unit switch with a marked ______ position that disconnected al the ungrounded conductors can serve as the appliance disconnection means. A. On B. Off C. On / off D. All of these

B. Off 422.34

When bonding the structural reinforcing steel of a swimming pool what is the smallest size wire-type solid bare copper bonding conductor permitted for is installation? A. 12 AWG B. 10 AWG C. 8 AWG D. 6 AWG

C. 8 AWG 680.26(B)(1)(a)

Threaded conduits or fittings installed in hazardous (classified) locations shall be made wrenchtight to ______. A. Prevent sparking when a fault current flows through the conduit system B. Ensure the explosion proof integrity of the conduit system where applicable C. A and B D. None of these

C. A and B 500.8(C)

The motor ________ currents listed in Tables 430.247 through 430.250 shall be used to determine the ampacity of motor circuit conductors and short-circuit and around-fault protection devices. A. Nameplate B. Full-load C. Power factor D. Service factor

C. Full-load 430.6(A)(1)

Before demand factors are taken into consideration for commercial occupancies, general purpose receptacle loads are the computer at NOT less than _____ per duplex or single receptacle outlet mounted on one yoke. A. 100 VA B. 120 VA C. 150 VA D. 180 VA

180 VA 220.14 (I)

The purpose of the NEC is ______. A. To have a installation that is efficient. B. The practical safeguarding of persons and property C. For cuter expansion of electrical use D. To provide a installation that is adequate for good service

B. The practical safeguarding of persons and property 90.1(A)

Receptacles mounted to and supported by a cover shall be secured by more than one screw in less listed and identified for secure by a single screw. A. True B. False

A. True 406.5(C)

Surface-mounted fluorescent of LED luminaries are permitted within the slowest storage space of identified for this use. A. True B. False

A. True 410.16(C)(5)