NATIONAL ELECTRICAL CODE EXAM
Each portable structure at a carnival, circus, or fair shall be provided with a means to disconnect from all ungrounded conductors within sight of and within ____________ of the operator's station. (a) 3 ft (b) 6 ft (c) 8 ft (d) 10 ft
(b) 6 ft 525.21 Rides, Tents, and Concessions. (A) Disconnecting Means. A means to disconnect each portable structure from all ungrounded conductors shall be provided. The disconnecting means shall be located within sight of and within 1.8 m (6 ft) of the operator's station. The disconnecting means shall be readily accessible to the operator, including when the ride is in operation. Where accessible to unqualified persons, the disconnecting means shall be lockable. A shunt trip device that opens the fused disconnect or circuit breaker when a switch located in the ride operator's console is closed shall be a permissible method of opening the circuit.
A motor terminal housing enclosing rigidly mounted motor terminals shall have a minimum of _____________ between line terminals for a 230V motor. (a) 1/4 in. (b) 3/8 in. (c) 1/2 in. (d) 5/8 in.
(a) 1/4 in. 430.12(C) and Table 430.12(C)(1)
Surface-mounted luminaires with a ballast shall have a minimum clearance of ___________ from combustible low-density cellulose fiberboard, unless the luminaires is marked for surface mounting on combustible low-density cellulose fiberboard. (a) 1/2 in. (b) 1 in. (c) 1-1/2 in. (d) 2 in.
(c) 410.136(B) 410.136 Luminaire Mounting. (B) Combustible Low-Density Cellulose Fiberboard. Where a surface-mounted luminaire containing a ballast, transformer, LED driver, or power supply is to be installed on combustible low-density cellulose fiberboard, it shall be marked for this condition or shall be spaced not less than 38 mm (1-1⁄2 in.) from the surface of the fiberboard. Where such luminaires are partially or wholly recessed, the provisions of 410.110 through 410.122 shall apply.
Type UF cable used with a 24V landscape lighting system can have a minimum cover of _________________. (a) 6 in. (b) 12 in. (c) 18 in. (d) 24 in.
(a) 6 in.
TPT and TST cords shall be permitted in lengths not exceeding __________ when attached directly to a portable appliance rated 50W or less. (a) 8 ft (b) 10 ft (c) 15 ft (d) 20 ft
(a) 8 ft Table 400.4 Note 11 Flexible Cords and Flexible Cables 11 - Types TPT and TST shall be permitted in lengths not exceeding 2.5 m (8 ft) where attached directly, or by means of a special type of plug, to a portable appliance rated at 50 watts or less and of such nature that extreme flexibility of the cord is essential.
A 10 AWG stranded copper conductor has a cross-sectional area of ___________. (a) 0.007 sq in. (b) 0.011 sq in. (c) 0.012 sq in. (d) 0.106 sq in.
(b) 0.011 sq in. Chapter 9, Table 8
The distribution point is also known as the ________________. (a) center yard pole (b) meter pole (c) common distribution point (d) all of these
(d) all of these 547.2 Note No 1, Distribution Point Distribution points are also known as the center yard pole, meter-pole, or the common distribution point.
When an outlet is _____________ from a cellular concrete floor raceway, the sections of circuit conductors supplying the outlet shall be removed from the raceway. (a) discontinued (b) abandoned (c) removed (d) any of these
(d) any of these
Equipment or materials included in a list published by a testing laboratory acceptable to the authority having jurisdiction is said to be "______________." (a) book (b) digest (c) manifest (d) listed
(d) listed 100 Listed Equipment, materials, or services included in a list published by an organization that is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services, and whose listing stated that either the equipment, material, or service meets appropriate designated standards or has been tested and found suitable for specified purpose. (CMP-1)
Where fixed multi-outlet assemblies are used in other than dwelling units or the guest rooms of hotels or motels, each _____________ or fraction thereof of each separate and continuous length shall be considered as 180 VA where appliances are unlikely to be used simultaneously. (a) 5 ft (b) 5-1/2 ft (c) 6 ft (d) 6-1/2 ft
(a) 5 ft 220.14(H)(1) Other Loads — All Occupancies. (H) Fixed Multi-outlet Assemblies. Fixed multi-outlet assemblies used in other than dwelling units or the guest rooms or guest suites of hotels or motels shall be calculated in accordance with (H)(1) or (H)(2). For the purposes of this section, the calculation shall be permitted to be based on the portion that contains receptacle outlets. (1) Where appliances are unlikely to be used simultaneously, each 1.5 m (5 ft) or fraction thereof of each separate and continuous length shall be considered as one outlet of not less than 180 volt-amperes.
The number of conductors permitted in LFNC shall not exceed the percentage fill specified in ______________. (a) Chapter 9, Table 1 (b) Table 250.66 (c) Table 310.15(B)(16) (d) 240.6
(a) Chapter 9, Table 1 356.22 Number of Conductors. The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9.
The screw shell of a luminaire or lamp-holder shall be connected to the _______________. (a) grounded conductor (b) ungrounded conductor (c) equipment grounding conductor (d) forming shell terminal
(a) grounded conductor 200.10(C) Identification of Terminals (C) Screw Shells. For devices with screw shells, the terminal for the grounded conductor shall be the one connected to the screw shell.
Wiring methods for PV systems conductors are not permitted within _____________ of the roof decking or sheathing except where located directly below the roof surface that is covered by PV modules and associated equipment. (a) 6 in. (b) 10 in. (c) 12 in. (d) none of these
(b) 10 in. 690.31(E)(1) Methods Permitted.
Receptacles and cord connectors shall be rated not less than ____________ at 125V, or at 250V, and shall be of a type not suitable for use as lamp-holders. (a) 10A (b) 15A (c) 20A (d) 30A
(b) 15A 406.3 Receptacle Rating and Type. (B) Rating. Receptacles and cord connectors shall be rated not less than 15 amperes, 125 volts, or 15 amperes, 250 volts, and shall be of a type not suitable for use as lamp-holders.
Two intermediate metal or rigid metal conduits threaded wrench-tight into the enclosure can be used to support an outlet box containing devices or luminaires, if each raceway is supported within ___________ of the box. (a) 12 in. (b) 18 in. (c) 24 in. (d) 36 in.
(b) 18 in. 314.23 Supports. (F) Raceway-Supported Enclosures, with Devices, Luminaires, or Lamp-holders. An enclosure that contains a device(s), other than splicing devices, or supports a luminaire(s), a lamp-holder, or other equipment and is supported by entering raceways shall not exceed 1650 cm3 (100 in.3) in size. It shall have threaded entries or identified hubs. It shall be supported by two or more conduits threaded wrench-tight into the enclosure or hubs. Each conduit shall be secured within 450 mm (18 in.) of the enclosure.
What is the park electrical wiring system load, after applying the demand factors, for a mobile home park having six mobile homes? (a) 4,640 VA (b) 27,840 VA (c) 96,000 VA (d) 144,000 VA
(b) 27,840 VA 550.31 Table 550.31 16,000 VA X 6 = 96,000 VA 96,000 VA X 0.29 = 27,840 VA
Junction boxes for pool lighting shall be located not less than ____________ from the inside wall of a pool unless separated by a fence or wall. (a) 3 ft (b) 4 ft (c) 6 ft (d) 8 ft
(b) 4 ft 680.24 Junction Boxes and Electrical Enclosures for Transformers or Ground-Fault Circuit Interrupters. (A) Junction Boxes. A junction box connected to a conduit that extends directly to a forming shell or mounting bracket of a no-niche luminaire shall meet the requirements of this section. (b) Horizontal Spacing. The junction box shall be located not less than 1.2 m (4 ft) from the inside wall of the pool, unless separated from the pool by a solid fence, wall, or other permanent barrier.
Switches shall be located at least _____________, measured horizontally, from the inside walls of an indoor spa or hot tub. (a) 4 ft (b) 5 ft (c) 7 ft 6 in. (d) 12 ft
(b) 5 ft 680.43(C) Indoor Installations. (C) Switches. Switches shall be located at least 1.5 m (5 ft), measured horizontally, from the inside walls of the spa or hot tub.
Locations in which combustible dust is in the air under normal operating conditions in quantities sufficient to produce explosive or ignitible mixtures are classified as ________________. (a) Class I, Division 2 (b) Class II, Division 1 (c) Class II, Division 2 (d) Class III, Division 1
(b) Class II, Division 1 500.5(C)(1)(1) Classifications of Locations. (C) Class II Locations. (1) Class II, Division 1. A Class II, Division 1 location is a location: (1) In which combustible dust is in the air under normal operating conditions in quantities sufficient to produce explosive or ignitible mixtures, or
Neon tubing which is readily accessible to pedestrians shall be protected from physical damage, other than _______________. (a) Class I, Division 1 locations (b) dry-location portable signs (c) fixed equipment (d) wet-location portable signs
(b) dry-location portable signs 600.9 Location. (B) Pedestrians. Neon tubing, other than listed, dry-location, portable signs, readily accessible to pedestrians shall be protected from physical damage.
Type FCC cable of _____________ copper conductors placed edge-to-edge, separated and enclosed within an insulating assembly. (a) 3 or more square (b) 2 or more round (c) 3 or more flat (d) 2 or more flat
(c) 3 or more flat 324.2 Definitions. Type FCC Cable. Three or more flat copper conductors placed edge-to-edge and separated and enclosed within an insulating assembly.
Dry-type transformers installed indoors rated over ___________ shall be installed in a vault. (a) 1,000V (b) 20,000V (c) 35,000V (d) 50,000V
(c) 35,000V 450.21 Dry-Type Transformers Installed Indoors. (C) Over 35,000 Volts. Dry-type transformers rated over 35,000 volts shall be installed in a vault complying with Part III of this article.
Type MC cable shall be secured at intervals not exceeding ____________. (a) 3 ft (b) 4 ft (c) 6 ft (d) 8 ft
(c) 6 ft 330.30 Securing and Supporting. (B) Securing. Unless otherwise provided, cables shall be secured at intervals not exceeding 1.8 m (6 ft). Cables containing four or fewer conductors sized no larger than 10 AWG shall be secured within 300 mm (12 in.) of every box, cabinet, fitting, or other cable termination. In vertical installations, listed cables with ungrounded conductors 250 kcmil and larger shall be permitted to be secured at intervals not exceeding 3 m (10 ft).
______________ is a raceway of circular cross section having an outer liquid-tight, nonmetallic, sunlight-resistant jacket over an inner flexible metal core. (a) FMC (b) LFNMC (c) LFMC (d) none of these
(c) LFMC 350.2 Definition. Liquid-tight Flexible Metal Conduit (LFMC). A raceway of circular cross section having an outer liquid-tight, nonmetallic, sunlight-resistant jacket over an inner flexible metal core with associated couplings, connectors, and fittings for the installation of electric conductors.
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 362.48 Joints. All joints between lengths of tubing and between tubing and couplings, fittings, and boxes shall be by an approved method.
Where the main bonding jumper is installed from the grounded conductor terminal bar to the equipment grounding terminal bar in service equipment, the _____________ conductor is permitted to be connected to the equipment grounding terminal bar. (a) grounding (b) grounded (c) grounding electrode (d) none of these
(c) grounding electrode 250.24(A)(4) Grounding Service-Supplied Alternating-Current Systems. (A) System Grounding Connections. A premises wiring system supplied by a grounded ac service shall have a grounding electrode conductor connected to the grounded service conductor, at each service, in accordance with 250.24(A)(1) through (A)(5). (4) Main Bonding Jumper as Wire or Bus-bar. Where the main bonding jumper specified in 250.28 is a wire or bus-bar and is installed from the grounded conductor terminal bar or bus to the equipment grounding terminal bar or bus in the service equipment, the grounding electrode conductor shall be permitted to be connected to the equipment grounding terminal, bar, or bus to which the main bonding jumper is connected.
In dwelling units, when determining the spacing of receptacle outlets, ____________ on exterior walls shall not be considered wall space. (a) fixed panels (b) fixed glass (c) sliding panels (d) all of these
(c) sliding panels 210.52(A)(2)(2) Dwelling Unit Receptacle Outlets. (A) General Provisions. (2) Wall Space. As used in this section, a wall space shall include the following: (2) The space occupied by fixed panels in walls, excluding sliding panels
Fixed storage-type water heater having a capacity of ____________ gallons or less shall be considered a continuous load for the purposes of sizing branch circuits. (a) 60 (b) 75 (c) 90 (d) 120
(d) 120 422.13 Storage-Type Water Heaters. A fixed storage-type water heater that has a capacity of 450 L (120 gal) or less shall be considered a continuous load for the purposes of sizing branch circuits.
Where conductors or cables are installed in circular conduits exposed to direct sunlight on or above rooftops, the ambient temperature shall be increased by _____________ where the conduits are less than 1/2 in. from the rooftop. (a) 30*F (b) 40*F (c) 50*F (d) 60*F
(d) 60*F 310.15(B)(3)(c)
Which of the following statements about Type S fuses are true? (a) Adapters shall fit Edison-base fuse-holders. (b) Adapters are designed to be easily removed. (c) Type S fuses shall be classified as not over 125V and 30A. (d) a and c
(d) a and c 240.53(A) Type S Fuses. (A) Classification. Type S fuses shall be classified at not over 125 volts and 0 to 15 amperes, 16 to 20 amperes, and 21 to 30 amperes. 240.54 Type S Fuses, Adapters, and Fuse-holders. (A) To Fit Edison-Base Fuse-holders. Type S adapters shall fit Edison-base fuse-holders.
Luminaires must 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. surface-mounted fluorescent luminaires. (c) 6 in. for recessed fluorescent luminaires or recessed incandescent or LED luminaires with a completely enclosed light source. (d) all of these
(d) all of these 410.16(C)(1),(2),(3), and (4) (C) Location. The minimum clearance between luminaires installed in clothes closets and the nearest point of a closet storage space shall be as follows: (1) 300 mm (12 in.) for surface-mounted incandescent or LED luminaires with a completely enclosed light source installed on the wall above the door or on the ceiling. (2) 150 mm (6 in.) for surface-mounted fluorescent luminaires installed on the wall above the door or on the ceiling. (3) 150 mm (6 in.) for recessed incandescent or LED luminaires with a completely enclosed light source installed in the wall or the ceiling. (4) 150 mm (6 in.) for recessed fluorescent luminaires installed in the wall or the ceiling.
Temporary wiring in exhibition halls for display booths in assembly occupancies is permitted to be in accordance with Article 590, except __________________. (a) GFCI protection requirements of Article 590 are not required (b) flexible cords and cables listed for hard or extra-hard usage cords can be laid on floors where protected from contact with the general public (c) GFCI protection must be provided where required by the NEC except for the Article 90 requirements (d) all of these
(d) all of these 518.3(B) Other Articles. (B) Temporary Wiring. In exhibition halls used for display booths, as in trade shows, the temporary wiring shall be permitted to be installed in accordance with Article 590. Flexible cables and cords approved for hard or extra-hard usage shall be permitted to be laid on floors where protected from contact by the general public. The ground-fault circuit-interrupter requirements of 590.6 shall not apply. All other ground-fault circuit-interrupter requirements of this Code shall apply. Where ground-fault circuit interrupter protection for personnel is supplied by plug-and-cord-connection to the branch circuit or to the feeder, the ground fault circuit interrupter protection shall be listed as portable ground fault circuit interrupter protection or provide a level of protection equivalent to a portable ground fault circuit interrupter, whether assembled in the field or at the factory.
Type NM cable shall be protected from physical damage by __________. (a) EMT (b) Schedule 80 PVC conduit (c) RMC (d) any of these
(d) any of these 334.15(B) Exposed Work. (B) Protection from Physical Damage. Cable shall be protected from physical damage where necessary by rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, Type RTRC marked with the suffix-XW, or other approved means. Where passing through a floor, the cable shall be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, Type RTRC marked with the suffix -XW, or other approved means extending at least 150 mm (6 in.) above the floor. Type NMC cable installed in shallow chases or grooves in masonry, concrete, or adobe shall be protected in accordance with the requirements in 300.4(F) and covered with plaster, adobe, or similar finish.
Overhead network-powered broadband communications systems conductors shall be located no less than ___________ from the water's edge of swimming and wading pools, or the base of diving structures. (a) 10ft (b) 12ft (c) 18ft (d) none of these
(d) none of these 680.9 Overhead Conductor Clearances. Overhead conductors shall meet the clearance requirements in this section. Where a minimum clearance from the water level is given, the measurement shall be taken from the maximum water level of the specified body of water. TABLE 680.9(C) C. Horizontal limit of clearance measured from inside wall of the pool This limit shall extend to the outer edge of the structures listed in A and B of this table but not less than 3 m (10 ft).
A circuit breaker is a device designed to _____________ the circuit automatically on a predetermined overcurrent without damage to itself when properly applied within its rating. (a) energize (b) reset (c) connect (d) open
(d) open 100 Definitions Circuit Breaker. A device designed to open and close a circuit by non-automatic means and to open the circuit automatically on a predetermined overcurrent without damage to itself when properly applied within its rating.