EBK ELECTRICAL WIRING RESIDENTIAL
EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 17, Problem 14R

Lay-in fluorescent luminaires that rest on the metal framing members of a suspended ceiling cannot just lay on the framing members. NEC 410.36(B) requires that (1) framing members used to support recessed luminaires must be securely fastened to each other and to the building structure at appropriate intervals, and (2) the luminaires must _____________________

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A means shall be provided in each metal box over 100 cubic inches for the connection of an equipment grounding conductor. The means shall be permitted to be ______. a tapped hole the cover screw  III. a screw used to mount the box (a.) I only (c.) I & II only (b.) II only (d.) I, II or III
L1. Boxes are classified by type, construction, andA. installation location.B. luminaire support capability.C. number of knockouts.D. power rating L2. Which of the following devices must be placed at each end of an armored cable to prevent damage tothe conductors?A. An insulating sliderB. An insertion couplingC. An antishort bushingD. A metal loop fitting L3. Which of the following is the maximum cross-sectional conductor fill area for underfloor raceways?A. 50%B. 60%C. 40%D. 30%
3. Which of the following statements about the use of structural steel as an equipment grounding conductor(EGC) in an AC system is correct?A. Structural steel isn't allowed for use as an EGC.B. Structural steel can be used as an EGC bonding jumper between panelboards.C. Structural steel must have an EGC bonding jumper every three feet of structure.D. Structural steel can be used as an EGC when it's bonded at both ends.
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EBK ELECTRICAL WIRING RESIDENTIAL
Electrical Engineering
ISBN:9781337516549
Author:Simmons
Publisher:CENGAGE LEARNING - CONSIGNMENT
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