Residential Wireman Electrical Exam Questions With Correct Answers

The minimum size equipment grounding conductor for a 100 ampere, 120/240 volt single phase underground dwelling feeder whose ungrounded conductors have been increased in size from 3 AWG copper to 1 AWG copper is __ AWG copper Ampacities, Grounding 250.122(B) Table 250.122 Table 8 Ch 9 - Answers 4 The continuity of the grounded conductor shall depend on a busbar or __ only. Continuity, Grounded conductors 200.12 - Answers wire. Each multi-wire branch circuit shall be provided with a means that will ____ disconnect all ungrounded conductors at the point where the branch circuit originates. Disconnecting means, Branch circuits, multiwire 210.4(B) - Answers Simultaneously Balconies, decks, and porches that are accessible from the inside of the dwelling unit shall have at least one receptacle not more than __ ft. above the balcony, deck, or porch surface. Balconies, outdoor, receptacles for, 210.52(E)(3) - Answers 6 1/2 Where it is impracticable to locate the service head above the point of attachment, the service head location shall be permitted not farther than ___ inches from the point of attachment. Service drops, Connections, service head 230.54 (C) Exception - Answers 24 True/False: One of the means by which grounding conductors and bonding jumpers shall NOT be connected by is machine screw type fasteners. Connection of Grounding and Bonding Equipment 250.8 - Answers False Cables with entirely nonmetallic sheaths are permitted to enter the top of a surface-mounted enclosure through one or more nonflexible raceways not less than 450 mm (18 in.) and not more than __ feet in length Cabinets, Cutout Boxes, and Meter Socket Enclosures. 312.5(C) - Answers 10 The maximum allowable overcurrent protection for four 14/2 NM cables installed in contact with thermal insulation without maintaining spacing between cables is: Nonmetallic-sheathed cable, Insulation, Ampacity, 334.112, 334.80 - Answers 15 What kind of protection is required for an outdoor receptacle located under the soffit of a dwelling for holiday lighting? Ground-fault circuit interrupters, Outdoors, dwelling units, 210.8(A)(3) - Answers GFCI The minimum rating for a service disconnecting means for a building, other than a single family dwelling, consisting of three 2 wire circuits shall be__ amperes. Service equipment, Rating, 230.79(D) - Answers 60 Where ungrounded conductors are increased in size, equipment grounding conductors shall be increased in size ___. Grounding conductors, 250-III, Sizes, 250.122 250.122(B) - Answers proportionately True/ False: Unless listed for the control of other loads, general use dimmer switches, shall only be used to control permanently installed incandescent luminaires. Dimmers, Switch 404.14(E) - Answers True In what areas of a dwelling shall 125-volt, single phase, 15 and 20 ampere outlets not be required to be protected by an arc-fault circuit interupter? Dwellings, Arc-fault circuit-interrupter protection, 210.12(A) 210.12(A) - Answers Hallways A ground ring encircling the building or structure, in direct contact with the earth, shall consist of at least 20 feet of bare copper conductor NOT smaller than __ AWG. Ground ring 250.52(A)(4) - Answers 2 The minimum size copper equipment grounding conductor required for a 15-ampere branch circuit installed in rigid metal conduit that supplies a swimming pool pump motor is __ AWG. Swimming pools, fountains, and similar installations, 680.21(A)(1) - Answers 12 The maximum allowable ampacity of 18 AWG fixture wire is _ amperes. Tables, Ampacities, Fixture wire, Allowable Ampacity for Fixture Wires Table 402.5 - Answers 6 The minimum overhead clearance above the water level of a swimming pool for network-powered broadband communication equipment systems conductors shall be __ feet. 680.9(C) - Answers 22.5 The minimum depth of a box that is intended to enclose a flush device supplied by 14 AWG or smaller conductors shall be __ inches. Boxes, Depth, minimum, 314.24(B)(5) - Answers 15/16 The maximum height that kitchen counter-top receptacles may be installed above the counter top shall be __ inches. Countertops, outlets, 210.52(C)(5) - Answers 20