Residential wireman exam - Study guides, Class notes & Summaries

NEC Article ______ defines breakers and fuses. - Answers According to NEC Article 100, a device that opens and closes a circuit by nonautomatic means automatically closes for a predetermined overcurrent. Annex _____ of NEC covers conduit fill. - Answers Annex C of NEC covers conduit and tubing fill for conductors and fixture wire fill. NEMA stands for National Electrical Manufacturers Association - Answers True - NEMA is the acronym for National Electrical Manufacturers Association. Wha...

When nonmetallic device boxes that are 2-gang or more are used, the installed Type NM cable must be secured no more than __________ inches from the box. a.12 b.10 c.18 d.8 - Answers a 12 A low resistance path, which results in a high value of current that flows around, rather than through, a circuit is called a(n) __________ circuit. a. grounded b. short c. grounding d. open - Answers 1. A ____________________-ampere overcurrent protection device is required for a reside...

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 - ANSWERS4 The continuity of the grounded conductor shall depend on a busbar or __ only. Continuity, Grounded conductors 200.12 - ANSWERSwire. Each multi-wire branch circuit shall be provided with...

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 wi...

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 - ANSWERS4 The continuity of the grounded conductor shall depend on a busbar or __ only. Continuity, Grounded conductors 200.12 - ANSWERSwire. Each multi-wire branch circuit shall be provided with...

1. A 20-ampere branch circuit requires _____ AWG conductors, ignoring the effects of voltage drop. a. 14 aluminum b. 14 copper c. 12 copper d. 12 aluminum - Answers 12 copper 2. A continuous load shall not exceed _____ of the rating of the branch circuit. a. 125% b. 100% c. 50% d. 80% - Answers 80% 3. A dual-rated conductor marked THHN/THWN is rated_____ when used in dry locations. a. 30°C (86°F) b. 90°C (194°F) c. 60°C (140°F) d. 75°C (167°F) - Answers 90°C 4. A r...

Ferrous metal enclosures for grounding electrode conductors shall be _____. a) electrically continuous b) electrically isolated c) not permitted d) rigid metal conduit (RMC) only - Answers A: electrically continuous Ref: 250.64(E) Unless listed for the control of other loads, general use dimmer switches shall only be used to control _____. a) switched receptacles for cord-connected incandescent luminaires b) permanently installed incandescent luminaires c) ceiling fans with luminaires...

When a single branch-circuit with an equipment grounding conductor is supplying a detached garage from a house, what, if any, additional grounding electrode(s) is/are required at the garage? a) A ground rod and underground metal water pipe. b) A metal underground water pipe only. c) A metal underground water pipe and building steel, if available. d) No additional electrodes are required. - Answers D: No additional electrodes are required. Ref: 250.32(A), Ex. The point of attachment of a ...

What is the MAXIMUM allowable cord length for the cord supplying a cord-and-plug connected dishwasher installed under a kitchen counter in a dwelling unit? a) 11⁄2 feet b) 2 feet c) 3 feet d) 4 feet - Answers D: 4 feet Ref: 422.16(B)(2)(2) What is the MINIMUM size copper SE cable with type THHW insulation that may be used as ungrounded, service-entrance phase conductors for a 150 ampere-rated, 120/240-volt, singlephase, residential service? a) 1/0 AWG b) 1 AWG c) 2 AWG d) 3 AWG - A...

The MAXIMUM height that kitchen countertop receptacle outlets may be installed above the countertop shall be _____. a) 12 inches b) 18 inches c) 20 inches d) 24 inches - Answers C: 20 inches Ref: 210.52(C)(5) For dwelling units, panelboards are permitted to be located in all the areas listed EXCEPT _____. a) hallways b) garages c) kitchens d) bathrooms - Answers D: bathrooms Ref: 240.24(E) The MAXIMUM number of grounded conductors allowed to be terminated in an individual termina...