428
d. 6
A GFCI-protected, locking-type, single, grounding-type receptacle that provides power to a pool recirculating pump motor shall be permitted not less than ___ feet from the inside wall of the swimming pool. Select one: a. 4 b. 12 c. 15 d. 6
e. two-fer
A ___ is an assembly cable containing one male and two female cord connectors used to connect two loads to one branch circuit. Select one: a. transfer cable b. splitter c. tap box d. breakout assembly e. two-fer
a. 5
A hotel has a stationary sign installed inside a fountain. Measured from the outside edges of the fountain, the sign shall be at least ___ feet from any edge. Select one: a. 5 b. 4 c. 3 d. 2
d. 2 Capacitor: 60,000/(480 × 1.732) = 72 × 1.35 = 97 amp - 3 AWG Motor: 240 amps × 1.25 = 300 amps - 350 kcmil where 350 kcmil has an ampacity of 310 amps (Ref 75 ºC column) 310 amps/3 = 103.3 amps - 2 AWG
A three-phase capacitor bank is rated for 60 KVARs at 480 volts. The bank is to be connected to a 200 hp, 460-volt, three-phase motor. The minimum size THHN copper conductors required for the capacitor bank are ___ AWG or kcmil. Select one: a. 6 b. 4 c. 350 d. 2 e. 3
a. LED
A(An) ___ sign shall be controlled by an externally operable switch or circuit breaker that will open all ungrounded conductors and controls no other load. Select one: a. LED b. directional exit c. cord-connected d. all of these
b. 20
All 125-volt receptacles located within ___ feet of the inside wall of the pool or fountain shall be protected by a GFCI. Select one: a. 5 b. 20 c. 10 d. 8 e. 12
b. ground-fault circuit interrupters
All electric equipment, including power supply cords, used with storable pools shall be protected by ___. Select one: a. time-delay fuses b. ground-fault circuit interrupters c. circuit breakers d. current-limiting fuses
b. 8
All exposed incandescent lamps in theater dressing rooms, where less than ___ feet from the floor, shall be equipped with open-end guards riveted to the outlet box cover or otherwise sealed or locked in place. Select one: a. 7 b. 8 c. 2 1/ 2 d. 10 e. 5
b. 88 150 - 25 = 125 125 × 70% = 87.5 = 88
An RV campground has 150 campsites with electrical power. Twenty-five of the campsites are reserved as tent sites. How many sites are required to have a 30-amp, 125-volt receptacle? Select one: a. 125 b. 88 c. 0 d. 150 e. 25
c. two-fer
An assembly containing one male plug and two female cord connectors used to connect two loads to one branch circuit is a(n) ___. Select one: a. bundle b. extension cable c. two-fer d. breakout assembly
b. 605
Article ___ covers electrical equipment, lighting accessories, and wiring systems used to connect, or contained within, or installed on office furnishings. Select one: a. 685 b. 605 c. 645 d. 604 e. 647
b. 5
Audio system equipment supplied by branch-circuit power shall not be placed laterally within ___ ft of the inside wall of a pool, spa, hot tub, or fountain. Select one: a. 10 b. 5 c. 20 d. 8 e. 3
b. 30
Branch circuits that supply neon tubing installations shall not be rated in excess of ___ amperes. Select one: a. 50 b. 30 c. 20 d. 15
e. 20
Cable trays containing welding cables must have a permanent sign attached to the cable tray at intervals not greater than ___ feet. Select one: a. 50 b. 6 c. 10 d. 12 e. 20
b. 125
Conductors supplying only a fire pump motor(s) shall have a rating not less than ___ percent of the fire pump motor(s) full-load current(s). Select one: a. 100 b. 125 c. 150 d. 80
d. 8
Conductors supplying outlets for arc and xenon projectors of the professional type shall not be smaller than ___ AWG and shall have an ampacity not less than the projector current rating. Select one: a. 4 b. 10 c. 6 d. 8 e. 3
a. intermittent
Duty on elevator driving machine motors shall be rated as ___. Select one: a. intermittent b. varying c. periodic d. noncontinuous
b. 6
Each carnival ride and concession shall be provided with a fused disconnect switch located within sight of and within ___ feet of the operator's station. Select one: a. 8 b. 6 c. 25 d. 10 e. 50
b. interlock
Electric vehicle supply equipment shall be provided with a(n) ___ that de-energizes the electric vehicle connector and its cable whenever the electrical connector is uncoupled from the electric vehicle. Select one: a. trigger b. interlock c. shunt-trip circuit breaker d. operator mechanism e. disconnecting means
c. I & II
Fixed stage switchboards shall be permitted to supply power to ___. I. stage equipment II. non-stage equipment Select one: a. I only b. II only c. I & II d. neither I nor II
a. 20
For industrial X-ray equipment, size 18 AWG or 16 AWG fixture wires and flexible cords shall be permitted for the control and operating circuits where protected by not larger than ___-ampere overcurrent devices. Select one: a. 20 b. 15 c. 25 d. 30
b. 125
For phase converters where the loads to be supplied are variable, the ampacity of single-phase supply conductors shall not be less than ___ percent of the phase converter nameplate single-phase input full-load amperes. Select one: a. 150 b. 125 c. 75 d. 100
c. the low voltage contact limit
Ground-fault circuit interrupters shall be installed in the branch circuit supplying underwater pool luminaires operating at more than ___. Select one: a. the nameplate rating b. 120 volts c. the low voltage contact limit d. 24 volts
a. an individual
Hydromassage bathtubs and their associated electrical components shall be connected to ___ branch circuit. Select one: a. an individual b. a multiwire c. the nearest available d. any of these
b. II only
If a construction trailer with a computed load of 32 amps arrives on the construction site and the trailer has no power supply cord, which of the following is permitted by the NEC®? I. Install a service on the trailer. II. Run a feeder to the trailer from the adjacent service equipment. Select one: a. I only b. II only c. either I or II d. neither I nor II
a. in an approved readily accessible location
In an information technology equipment room, the disconnecting means for the computers shall be ___. Select one: a. in an approved readily accessible location b. within sight of the equipment c. within 30 feet of the equipment d. at the main disconnect
d. 12
In outdoor pool areas, ceiling-suspended (paddle) fans shall not be installed above the pool or over the area extending 5 feet horizontally from the inside walls of the pool unless no part of the fan is less than ___ feet above the maximum water level. Select one: a. 5 b. 10 c. 8 d. 12 e. 7 1/ 2
a. 4
Junction boxes for pool lighting shall not be located less than ___ feet from the inside wall of a pool unless separated by a fence or wall. Select one: a. 4 b. 6 c. 8 d. 3
b. point of attachment
Manufactured building service-entrance conductors must be installed after erection at the building site unless the ___ is known prior to manufacture. Select one: a. connected load b. point of attachment c. minimum transportation clearance d. conductor length
b. I or II only
Manufactured wiring system cable shall be listed armored cable or metal-clad cable containing nominal 600-volt copper-insulated conductors with a bare or insulated copper equipment grounding conductor equivalent in size to the ungrounded conductor. These conductors shall be permitted to be ___ AWG. I. 10 II. 12 III. 14 Select one: a. I only b. I or II only c. II or III only d. I, II, or III e. II only
d. supply
Means shall be provided to disconnect simultaneously all ungrounded single-phase ___ conductors to a phase converter. Select one: a. load b. neutral c. service d. supply
a. 6
No receptacle shall ever be permitted to be installed within ___ feet of the inside walls of a pool. Select one: a. 6 b. 15 c. 18 d. 20
d. 3 18
Open conductors of not over 600 volts, nominal, shall have a horizontal clearance of not less than ___ feet and a vertical clearance of not less than ___ feet in all areas subject to recreational vehicle movement. Select one: a. 6 20 b. 5 18 c. 4 8 d. 3 18
a. 2 ft.
Outdoor mobile home disconnecting means shall be installed so the bottom of the enclosure containing the disconnecting means is not less than ___ above finished grade or the working platform. Select one: a. 2 ft. b. 2 1/ 2 ft. c. 6 ft-6 in. d. 6 ft-7 in. e. 1 1/ 2 ft.
d. 125
Overcurrent protection for feeders and branch circuits supplying electric vehicle supply equipment shall have a rating of not less than ___% of the maximum load of the electric vehicle supply equipment. Select one: a. 200 b. 100 c. 150 d. 125 e. 80
c. 1'
Resistors and reactors, for use over 600 volts, shall not be installed in close enough proximity to combustible materials to constitute a fire hazard and shall have a clearance of not less than ___ from combustible materials. Select one: a. 6" b. 18" c. 1' d. 2'
c. 200
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 ___ percent of the current rating of the transformer. Select one: a. 100 b. 125 c. 200 d. 80
d. neither a nor b
The NEC® requires ___ to be listed where installation is in conformance with the Code. Select one: a. field-installed skeleton tubing b. outline lighting c. both a and b d. neither a nor b
a. 30 inches
The disconnecting means for shore power to a boat shall be readily accessible, located not more than ___ from the receptacle it controls, and shall be located in the supply circuit ahead of the receptacle. Select one: a. 30 inches b. 5 feet c. 6 feet d. 3 feet
b. 5
The minimum distance from switches to the inside walls of a spa or hot tub installed indoors shall be ___ feet. Select one: a. 15 b. 5 c. 10 d. 18
b. 100
The minimum rating of service equipment for a mobile home is ___ amperes. Select one: a. 60 b. 100 c. 125 d. 50
c. 2/0 45,000/(208 × 1.732) = 124.9 amps 124.9 × 1.35 = 168.6 amps 2/0 AWG The correct answer is: 2/0
The minimum size THHN copper conductors required for a 45 KVAR capacitor bank connected to a 208-volt, three-phase line are ___ AWG or kcmil. Select one: a. 350 b. 1 c. 2/0 d. 250 e. 1/0
c. 21 36 1/ 2
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 ___ feet and shall not exceed ___ feet. Select one: a. 20 50 b. 12 30 c. 21 36 1/ 2 d. 11 20
b. 36 1/2
The power supply cord to a mobile home must not be longer than ___ feet. Select one: a. 21 b. 36 1/2 c. 26 1/2 d. 50 e. 20
a. 3600
The service calculation for an RV park shall include not less than ___ volt-amperes per site for those sites equipped with both 20-ampere and 30-ampere supply facilities. Select one: a. 3600 b. 600 c. 1620 d. 9600 e. 2400
a. adjacent to
The service equipment for floating docks or marinas shall be located ___ the floating structure. Select one: a. adjacent to b. on the exterior of c. below the deck level of d. inside
b. I, III & IV only
The term pool includes swimming, wading and therapeutic pools and the term fountain includes ___. I. ornamental pools II. drinking fountains III. display pools IV. reflection pools Select one: a. III & IV only b. I, III & IV only c. I & II only d. II & III only
a. 15
The voltage at a fire pump controller's line terminals shall not drop more than ___% below normal (controller-rated voltage) under motor starting conditions. Select one: a. 15 b. 80 c. 115 d. 100 e. 5
e. 6
Traveling cable shall be permitted to be run without the use of a raceway for a distance not exceeding ___ feet 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. Select one: a. 7 b. 10 c. 12 d. 3 e. 6
c. 18
Unless specifically listed for the purpose and location, the coupling means of electric vehicle supply equipment shall be stored or located at a height of not less than ___ inches above an indoor parking surface. Select one: a. 12 b. 36 c. 18 d. 24
e. 16
Wet niche or no niche luminaires that are supplied by a flexible cord or cable shall have all exposed non-current-carrying metal parts grounded by an insulated copper equipment grounding conductor not smaller than the supply conductors and not smaller than ___ AWG. Select one: a. 12 b. 8 c. 14 d. 10 e. 16
a. 20 AWG
What are the minimum size conductors (in elevator traveling cables) permitted in parallel to supply lighting circuits? Select one: a. 20 AWG b. 24 AWG c. 18 AWG d. 14 AWG
a. 225
When sizing fuses for a branch circuit serving a hermetic refrigerant motor-compressor, the device shall NEVER exceed ___ percent of the rated-load current marked on the nameplate of the equipment. Select one: a. 225 b. 115 c. 175 d. 125
b. 12
Where GFCI protection is located in the power-supply cord for an outdoor portable sign, the ground-fault circuit interrupter shall be located within ___ inches of the attachment plug. Select one: a. 6 b. 12 c. 18 d. 24
c. 6 20
Where a permanently installed pool is installed at a dwelling unit, at least one 125-volt, 15- or 20-ampere receptacle on a general-purpose branch circuit shall be located a minimum of ___ feet from and not more than ___ feet from the inside wall of the pool. Select one: a. 5 10 b. 3 6 c. 6 20 d. 8 20 e. 8 15
b. "overcurrent protection provided at machine supply terminals"
Where overcurrent protection is provided as part of an industrial machine, the machine shall be marked ___. Select one: a. "this unit contains overcurrent protection" b. "overcurrent protection provided at machine supply terminals" c. with the overcurrent protection category and type d. "fuses or circuit breaker enclosed"
c. brass rigid metal
Which of the following listed conduits does the NEC® permit to enclose conductors feeding wet-niche underwater pool lights? Select one: a. EMT b. galvanized rigid metal c. brass rigid metal d. ENT
a. mobile home
A ___ is a factory-assembled structure or structures transportable in one or more sections that are built on a permanent chassis and designed to be used as a dwelling without a permanent foundation where connected to the required utilities and that include the plumbing, heating, air-conditioning, and electrical systems contained therein. a. mobile home b. park trailer c. manufactured home d. manufactured building
c. floating building
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 electrical supply system not located on the premises. Select one: a. marina b. shore power unit c. floating building d. floating pier
e. 20
A minimum of ___% of all recreational vehicle sites, with electrical supply, shall each be equipped with a 50-ampere, 125/250-volt receptacle. Select one: a. 50 b. 70 c. 30 d. 25 e. 20
d. 22 1/2
A single-family residence is served with insulated 120/240-volt service-drop conductors, supported with a grounded messenger wire from the utility company. This service drop crosses the pool and the pool has a diving board that is 5 feet above the water level. The minimum height above water level of the service drop as permitted by the NEC® is ___ feet. Select one: a. 25 b. 14 1/2 c. 19 1/2 d. 22 1/2
b. 8
All cables installed in agricultural buildings shall be secured within ___ inches of each cabinet, box, or fitting. Select one: a. 24 b. 8 c. 12 d. 36 e. 6
b. enclosed
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 walks, or in the runways and machinery spaces of platform lifts and stairway lifts shall be ___ to protect against accidental contact. Select one: a. guarded b. enclosed c. grounded d. separated e. arranged
d. any of these
Fire pump supply conductors on the load side of the final disconnecting means and overcurrent devices shall be permitted to be routed through a building if they are ___. Select one: a. encased by at least 2 inches of concrete b. protected by a fire-rated assembly listed to achieve a minimum fire rating of 2 hours and dedicated to the fire pump circuit c. a listed electrical circuit protective system with a minimum 2-hour fire rating d. any of these
b. 42
Storable swimming pools are capable of holding water to a maximum depth of ___ inches. Select one: a. 60 b. 42 c. 48 d. 72 e. 36
d. 8 AWG
What size conductor shall be connected between the ground grid and all metal parts of swimming pools? Select one: a. 4 AWG b. 6 AWG c. 10 AWG d. 8 AWG
b. 30
When 10/2 AWG with ground type SO cord is used to supply border lights in a theater, the cable has an ampacity of ___ amps. Select one: a. 20 b. 30 c. 41 d. 25 e. 47
a. 100
Where an assembly occupancy forms a portion of a building containing other occupancies, occupancy of any room or space for assembly purposes by less than ___ persons in one of the other occupancies shall be classified as part of the other occupancy and subject to the provisions applicable thereto. Select one: a. 100 b. 99 c. 101 d. 200
c. 1 1/ 2
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 ___ inch(es) from the surface wired over. Select one: a. 2 b. 6 c. 1 1/ 2 d. 1 e. 3
a. manufactured building
A ___ 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 for assembly and installation on the building site, other than manufactured homes, mobile homes, park trailers, or recreational vehicles. Select one: a. manufactured building b. temporary installation c. building system d. none of these
b. 5
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 not less than ___ feet away, adjacent to, and within sight of the spa or hot tub. Select one: a. 10 b. 5 c. 12 d. 8 e. 20
b. 100
A place of assembly is a building or portion of building designed or intended for the assembly of ___ or more persons. Select one: a. 200 b. 100 c. 50 d. 125
b. 1 3/ 8
A professional projector is a type of projector using 35- or 70- mm film that has a minimum width of ___ inches and has on each edge 5.4 perforations per inch, or a type using carbon arc, xenon, or other light source equipment that develops hazardous gases, dust, or radiation. Select one: a. 1 1/ 2 b. 1 3/ 8 c. 2 1/ 8 d. 1 5/ 8 e. 3 1/ 2
c. 1/ 4"
A spacing of not less than ___ shall be maintained between neon tubing and the nearest surface, other than its support. Select one: a. 3/ 8" b. 5/ 16" c. 1/ 4" d. 1/ 2"
d. all of these
A theater stage switchboard is used primarily to feed stage equipment and can contain ___. dimmers or relays with associated overcurrent protective devices, or overcurrent protective devices alone,. Select one: a. dimmers b. relays c. fuses d. all of these
b. 150
An RV campground has at total of 150 campsites with electrical power. Twenty-five of the campsites are reserved as tent sites. How many sites are required to have a 20-amp, 125-volt receptacle? Select one: a. 125 b. 150 c. 25 d. 0 e. 88
a. 5
Existing luminaires and lighting outlets located less than ___ feet measured horizontally from the inside walls of a pool shall be at least 5 feet above the surface of the maximum water level, shall be rigidly attached to the existing structure, and shall be protected by a GFCI. Select one: a. 5 b. 12 c. 7 1/ 2 d. 10 e. 8
a. each time that portable electrical equipment is connected
For a touring circus, continuity of the equipment grounding conductor system shall be verified ___. Select one: a. each time that portable electrical equipment is connected b. when cord-and-plug equipment is first installed
e. 70%
In a recreational vehicle park, what percentage of the spaces supplied with electricity must have 30-amp, 125-volt receptacles? Select one: a. 20% b. 30% c. 100% d. 60% e. 70%
a. 150
No luminaires shall be installed in swimming pools for operation on supply circuits over ___ volts between conductors. Select one: a. 150 b. 300 c. 50 d. 30 e. 130
d. I & III only
Shore power receptacles in a marina are required to be ___ if rated at 50 amps. I. of the locking and grounding type II. of the pin and sleeve type III. single receptacles Select one: a. III only b. II only c. I only d. I & III only e. II & III only
b. 14
Signs or outline lighting system equipment shall be at least ___ feet above areas accessible to vehicles unless protected from physical damage. Select one: a. 18 b. 14 c. 22 d. 10 e. 12
b. 5'
Switching devices shall be located at least ___ horizontally from the inside walls of the pool. Select one: a. 18" b. 5' c. 4' d. 2'
c. 50
The power supply to the mobile home shall be a feeder assembly consisting of not more than one listed ___-ampere mobile power-supply cord with an integrally molded or securely attached plug cap or a permanently installed feeder. Select one: a. 30 b. 100 c. 50 d. 60 e. 20
a. 50 1
The residual voltage of a capacitor shall be reduced to ___ volts, nominal, or less within ___ minute(s) after the capacitor is disconnected from the source of supply. Select one: a. 50 1 b. 15 10 c. 90 3 d. 10 5 e. 30 6
c. 5
Metal conduit and metal piping within ___ feet of the inside walls of the pool and that are not separated from the pool by a permanent barrier are required to be bonded. Select one: a. 4 b. 10 c. 5 d. 8
