Joey D, all I am saying is it is something to think about when selecting a bit, as sometime you may have an inspector that picks up on this and you may be putting in a lot of nail plates.

When I did NM in wood buildings we would always use a 7/8" bit just for this reason.

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300.4(A) Cables and Raceways Through Wood Members.

(1) Bored Holes. In both exposed and concealed locations, where a cable- or raceway-type wiring method is installed through bored holes in joists, rafters, or wood members, holes shall be bored so that the edge of the hole is not less than 32 mm (1 1/4 in.) from the nearest edge of the wood member. Where this distance cannot be maintained, the cable or raceway shall be protected from penetration by screws or nails by a steel plate or bushing, at least 1.6 mm (1/16 in.) thick, and of appropriate length and width installed to cover the area of the wiring.

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I have never had a nail or a screw into a wire in a new construction job

I am sure that is true, but it has nothing to do with following the code. [Linked Image]

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts