NEC CHALLANGE EXAM 2
a class III, division ___ location is where easily ignitible fibers/ flyings are stored or handled nut not manufactured. a. 1 b. 2 c. 3 d. all of these
2 NEC SECTION: 500.5(D)(2)
branch-circuit conductors within ___ in. of a ballast shall have an insulation temperature waiting not lower than 90c (194f) a. 1 b. 3 c. 6 d. 8
3 NEC SECTION: 410.68
For permanently connected appliances rated at not over ______ the branch circuit switch or circuit breaker can serve as the disconnectiong means where the switch or circuit breaker is within sight from the appliances, or is lockable in accordance within 110.25 A. 200 VA B. 300 VA C. 400 VA D. 500 VA
300 VA NEC SECTION: 422.31(B)
for listed explosion proof equipment, factory-threaded NPT entries shall be made up with at least __ threads fully engaged. a. 4 b. 4 1/2 c. 5 d. 6
4 1/2 NEC SECTION: 500.8(E)(1)Ex
lighting track shall not be installed less than ___ ft above the finished floor except where protected from physical damage or where the track operates at less than 30V rms, open-circuit voltage. a. 4 b. 5 c. 5 1/2 d. 6
5 NEC SECTION: 410.151(C)(8)
Surface mounted fluorescent luminaires in clothes closets shall be permitted on the wall above the door, or on the ceiling, provided there is a minimum clearance of _____ in. between the luminaire and the nearest point of a storage space. a. 3 b.6 c. 9 d. 12
6 NEC SECTION: 410.16(C)(2)
power distribution blocks installed in metal sideways shall ____ a. allow for sufficient wire bending space at terminals b. not have uninsulated exposed live parts c. a or b d. a and b
A AND B a. allow for sufficient wire bending space at terminals b. not have uninsulated exposed live parts
A ___ rated In amperes shall be permitted as a controller for all motors. a. branch-circuit inverse time circuit breaker b. molded case switch c. a and b d. none
A AND B a. branch-circuit inverse time circuit breaker b. molded case switch
An attachment plug and receptacle can serve as the disconnecting means for a single -phase room air conditioner rated 250V or less if ___ a. the manual controls on the roomier conditioner are readily accessible and located within 6 ft of the floor b. an approved manually operable disconnecting means is installed in a readily accessible location within sight from the room air conditioner c. a or b d. a and b
A OR B a. the manual controls on the roomier conditioner are readily accessible and located within 6 ft of the floor b. an approved manually operable disconnecting means is installed in a readily accessible location within sight from the room air conditioner NEC SECTION: 440.63(1) and (2)
Transformers and Transformer Vaults shall be readily accessible to qualified personal for inspection and maintenance , except _____ a. dry-tape transformers 1,000V or less, located in the open on walls, columns, or structures. b. dry-type transformers,ers 1,000 V , nominal , or less and not exceeding 50kVa in hollow spaces of buildings not permanently closed in by structure. c. a or b d. none
A OR B a. dry-tape transformers 1,000V or less, located in the open on walls, columns, or structures. b. dry-type transformers,ers 1,000 V , nominal , or less and not exceeding 50kVa in hollow spaces of buildings not permanently closed in by structure.
Article 410 covers luminaires, portable luminaires, lampholders, pendants, incandescent filament lamps, arc lamps, electric-discharge lamps, and _____, and the wiring and equipment forming part of such products and lighting installations. a. decorative lighting products b. lighting accessories for temporary seasonal and holiday use c. portable flexible lighting products d. all of these
ALL OF THESE NEC SECTION: 410.1
Luminaires shall maintain a minimum clearance from the closet storage space of _____. a. 12 in for surface mounted incandescent or LED luminaires with a completely enclosed light source b. 6 in for surface mounted fluorescent luminaires c. 6 in for recessed fluorescent luminaires or recessed incandescent LED luminaires with a completely enclosed light source d. all of these
ALL OF THESE NEC SECTION: 410.16(C)(1), (2), (3), AND (4)
hazardous (classified) locations shall be classified depending on the properties of the ___ that could be present, and the likelihood 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
ALL OF THESE NEC SECTION: 500.5(A)
Type TC cable shall not be _____. a. installed where it will be exposed to physical damage b. installed outside of a raceway or cable tray system , unless permitted in 336.10(4), 336.10(7), 336.10(9), and 336.10(10) c. used where exposed to direct rays of sun, unless identified as sunlight resistant d. all of these
ALL OF THESE NEC SECTION: 336.12(1), (2), AND (3)
equipment used in hazardous ( classified ) locations with metric threaded entries shall be installed using ___ a. NPT threaded fittings b. listed conduit fittings c. listed cable fittings d. b or c
B OR C b. listed conduit fittings c. listed cable fittings NEC SECTION : 500.8(E)(2)
Lighting track fittings can be equipped with general-purpose receptacles. a. true b. false
FALSE NEC SECTION: 410.151(A)
a motor controller shall open all conductors to the motor where not used as a disconnecting means a. true b. false
FALSE NEC SECTION: 430.84
separately derived system generators shall have the ____ conductor sized not smaller than required to carry the maximum unbalanced current as determined by 220.61 a. neutral b. grounding c. a and b d. none
NEUTRAL NEC SECTION: 445.13(A)
appliances that have a unit switch with a marked ____ position that disconnects all the underground conductors can serve as the appliance disconnecting means. a. on b. off c. on/off d. all of these
OFF NEC SECTION: 422.34
____ disconnecting means is required within sight of the storage battery for all ungrounded stationary battery system conductors operating at over 60V dc. a. accessible b. readily accessible c. safety d. all of these
Readily accessible NEC SECTION: 480.7(A)
A luminaire marked " suitable for wet locations " ____ be permitted to be used in a damp location a. shall b. shall not c. a or b d. none
SHALL NEC SECTION: 410.10(A)
ENT is not permitted in hazardous (classified) locations, unless permitted in other articles of the Code. a. true b. false
TRUE NEC SECTION: 362.12(1)
non grounding , nonlocking -type, 15A and 20A,125V and 250V receptacles used for replacements in a dwelling unit shall not be required to delisted as temper resistant. a. true b. false
TRUE NEC SECTION: 406.12 Ex to (1), (2), (3), (4), (5), (6), and (7):(4)
receptacles mounted to and supported by a cover shall be secured by more than one screw unless listed and identified for securing by a single screw. a. true b. false
TRUE NEC SECTION: 406.5(C)
the NEC allows a lighting outlet on the wall in a clothes closet when it is at least 6 in away from storage spaces. a. true b. false
TRUE NEC SECTION: 410.16(C)(2), (3), & (4)
surface-mounted fluorescent or LED luminaires are permitted within the closet storage space if identified for this use a. true b. false
TRUE NEC SECTION: 410.16(C)(5)
Outdoor luminaires and associated equipment can be supported by trees. a. true b. false
TRUE NEC SECTION: 410.36(G)
Wiring and equipment supplied from storage batteries shall be in accordance with chapters 1 through 4 of the NEC unless otherwise permitted by 480.6 A. True B. False
TRUE NEC SECTION: 480.5
where more than one motor disconnecting means is provided in the same motor branch circuit , at least one of the disconnecting means shall be readily accessible . a. true b. false
TRUE NEC SECTION : 430.107
unused openings for circuit breakers and switches in switchboards and panel boards shall be closed using ____ or other approved means that provide protection substantially equivalent to the wall of the enclosed. a. duct seal and tape b. identified clousures c. exothermic welding d. sheet metal
identified clousures NEC SECTION: 408.7
the purpose or use of panel board 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 panel board , and at each switch or circuit breaker in a switchboard or switchgear. a. manufacturers b. conductors c. feeders d. modifications
modifications NEC SECTION: 408.4(A)
Open motors having commutators or collector rings shall be located or protected so that sparks cannot reach adjacent combustible material. This shall not prohibit the installation of these motors_________. a. on wooden floors b. over combustible fiber c. under combustible fiber d. none
on wooden floors NEC SECTION: 430.14(B)Ex
Receptacles rated_____________or less and designed for the direct connection of aluminum conductors shall be listed and marked CO/ALR A. 5A B. 20A C. 25A D. 30A
20A NEC SECTION: 406.3(C)
class III , division___ locations include areas where easily ignitible fibers / flyings are handled, manufactured, or used a. 1 b. 2 c. 3 d. all of these
1 NEC SECTION: 500.5(D)(1)
low voltage lighting systems shall be installed not less than ___ ft horizontally from the nearest edge of the water in pools , spas, fountains, or similar locations, unless permitted by article 680. a. 5 b. 6 c. 10 d. 20
10 NEC SECTION: 411.5(B)
for stationary motor of 2 hp or less and 300V or less on ac circuits, the controller can be an ac-rated only general-use snap switch where the motor full-loaded current waiting is not more than____ percent of the rating of the switch. a. 50 b. 60 c. 70 d. 80
80 NEC SECTION: 430.83(C)(2)
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
A & C A.prevent sparking when a fault current flows through the conduit system B. ensure the explosion proof integrity of the conduit system where applicable NEC SECTION: 500.8(E)
the disconnecting means for a motor controller shall be designed so that it cannot ___ automatically. a. opem b. close c. restart d. shut down
CLOSE NEC SECTION: 430.103
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 ground -fault protection devices. a. nameplate b. full-load c. power factor d. service factor
FULL-LOAD NEC SECTION: 430.6(A)(1)
Coves for luminaires shall be located so that the lamps and equipment can be properly installed and _____. a. maintained b. protected from physical damage c. tested d. inspected
Maintained NEC SECTION: 410.18
Luminaires containing a metal halide lamp (other than a thick-glass PAR lamp) shall be provided with a containment barrier that encloses the lamp, or shall be provided with a physical means that only allows the use of a(n)________. a. Type O Lamp b. Type CB lamp c. a or b d. inert gas
Type O Lamp NEC SECTION: 410.130(F)(5)
where in the off position , a switch device with a marked OFF position shall completely disconnect all ____ conductors of the load it controls. a. grounded b. ungrounded c. grounding d. all of these
UNGROUNDED NEC SECTION: 404.20(B)
when the fluorescent luminaire disconnecting means for fluorescent luminaires that utilize double ended lamps (typical fluorescent lamps) is external to the luminaire, it shall be ____ a. accessible to qualified persons b. a single device c. located in sight of the disconnecting means d. all of these
all of these NEC SECTION: 410.130(G)(3)
When determining a class I, 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 in case of an accident. b. adequacy of ventilating equipment c. record of the industry or business with respect to explosions or fires d. all of these
all of these NEC SECTION: 500.5(B)(2) NOTE 1
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. cleaned b. documented c. maintained d. all of these
documented NEC SECTION: 500.4(A)
In determining the highest rated motor for purposes of complying with 430.24, 430.53(B), and 430.53(C), the highest rated motor shall be based on the rated full-load current as selected _____. a. from the motor nameplate b. from tables 430.247, 430.248, 430.249, and 430.250 c. by multiplying the horsepower by 746 watts d. using the largest horsepower motor
from tables 430.247, 430.248, 430.249, and 430.250 NEC SECTION: 430.17
Where a grounding means exists in the receptacle enclosure a(n)________-type receptacle shall be used. a. isolated ground b. grounding c. GFCI d. dedicated
grounding NEC SECTION: 406.4(D)(1)
duct heater controller equipment shall have a disconnecting means 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
sight from NEC SECTION: 424.65
Motors shall be located so that adequate _____ is provided and so that maintenance, such as lubrication of bearings and replacing of brushes, can be readily accomplished. a. space b. ventilation c. protection d. all of these
ventilation NEC SECTION: 430.14(A)
Nonblocking 15A and 20A and 250V receptacles installed in damp locations shall be listed as ____ a. raintight b. watertight c. weatherproof d. weather resistant
weather resistant NEC SECTION: 406.9(A)
