New circuit for kitchen


Old 02-25-02, 09:09 AM
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New circuit for kitchen


I am running 4 new circuits for a kitchen remodel.

Can I drill a 1" hole thru the joists in an unfinished basement and run these to the kitchen from the breaker panel approx 30 feet?
Or more importantly, do I have to worry about derating the cable due to cabling effect?

Im using 12/2NMB. The wires will obviously be together but not bound together with ties or anything.

Thanks in advance
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Old 02-25-02, 11:25 AM
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The answer is yes to the 1" hole, but I wouldn't do it anyway.

Drill a separate 5/8" hole for each 12/2 cable. Drill each hole dead center (vertically) in each joist, and don't drill in the middle third of the span. Separate each hole by a couple of inches. These guidelines will help maintain the strength of your joists.

No derating will be necessary.
Old 02-25-02, 11:32 AM
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Thanks John;

But if I choose to go with a 1" hole, do I have to derate?

Old 02-25-02, 02:31 PM
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You never need to derate Romex running through holes in wood, unless it is tightly packed together for a run of more than 24" (or maybe it's 16"?). Between the joists, the 4 cables will naturally hang together, but that's not considered tight enough to be subject to derating.

-- Jim

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