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EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition
Simmons
ISBN: 9781337516549

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BuyFindarrow_forward

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition
Simmons
ISBN: 9781337516549
Textbook Problem

The mounting holes in a device (switch) box are tapped for No. 6-32 screws. The mounting holes in an outlet box are tapped for No. 8-32 screws. The mounting holes in metal boxes for attaching equipment grounding conductors are tapped for ______________________ screws.

To determine

State the size of the screws required for tapping of metal boxes for attaching the equipment grounding conductors.

Explanation

Discussion:

Consider that the mounting holes in switch box and outlet box are tapped using No. 6-32 and No. 8-32 screws, respectively.

According to NEC 314.40(D), mounting holes in the metal box are required to attach the equipment grounding conductors. These holes are tapped using No...

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