Electrical Wiring: Residental - With Plans (Paperback) Package
Electrical Wiring: Residental - With Plans (Paperback) Package
18th Edition
ISBN: 9781305416376
Author: MULLIN
Publisher: Cengage
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Chapter 27, Problem 4R
  1. a. The service head must be located (above) (below) the point where the service-drop conductors are spliced to the service-entrance conductors. (Circle the correct answer.)
  2. b. What Code section provides the answer to part (a)? ___________________
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A ____shall be used to connect the equipment grounding conductors, the service equipment enclosures, and where the system is grounded, the grounded service conductor to the grounding electrode. (a.) bus bar ( b.) 5/8” ground rod (c.) neutral conductor (d.) grounding electrode cond.   For equipment rated 1200 amperes or more 600 volts or less, and over 6 feet wide, containing overcurrent devices, switching devices, or control devices, there shall be one entrance not less than ____inches wide and 6 ½ feet high at each end.  (a.) 24 (b.) 36 (c.) 30 (d.) 48   When calculating the conductor fill for strut-type channel raceway with internal joiners, the raceway shall be permitted to be filled to _____% of the cross-sectional area.  (a.) 20 ( c.) 30 (b.) 25 (d.) 40
9. How is equipment containing ungrounded electrical systems required to be marked? A. With green wiresB. With a sign reading "Caution: Ungrounded System Operating at _______ Volts Between Conductors" C. With a red X D. With a sign reading "Danger: Do Not Touch Ungrounded System, Operating at _______ Volts"
horizontal runs of IMC supported by openings through framing members at intervals not exceeding _____ ft and securely fastened within _____ ft of termination points shall be permitted. Select one: A. 1.5,4.5 B. 3,10 C. 2,5 D. 10,3
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