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Old 10-19-2007, 08:39 PM   #1
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Experts help needed :)


Thanks in advance, I have the following questions:

1. How many wires can be fed safely into a 4"x4"x1.5" junction box? I'm interested in having one hot wire feed four different light/outlet combos (5 wires joined in the box).

2. Is it ok to run wire (12/2 or 14/2) between a stud wall and a poured cement basement wall? The stud wall is snug with the cement wall, but there is enough room to string wire behind it.

3. Is there a limit on the number of wires going into a recessed can light box?

4. Is a kink or bend in a 12/2 or 14/2 wire a concern? The insulation is fully intact and the wire is fastened securely.

5. Can i use a 15 amp single pole switch on a 20 amp circuit with 12/2 wire?

Thanks again,
C

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Old 10-19-2007, 09:39 PM   #2
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Experts help needed :)


1) 4x4x1.5 = 21cu/in = 9- #12 conductors.
ALL the grounds count as one, so you can have four 12/2 cables in this box.
For #14 you can have 10- #14 conductors, which is also four 14/2's, or three 14/2 and one 14/3.

2) It's ok, but not ok IMO in your situation. I'd say it's fine if there were a decent gap, like an inch. Just enough to slip a cable in is not enough to prevent damage to the cable.

3) Yes. It is marked in the box or on the cover.

4) Yes, provided you are not switching more than 15 amps (highly unlikely in a home).

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Answers based on the 2008 & 2011 NEC.
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