Would it be illegal to fish a 12/4 mc to an exit and use the blue and red wires for the 6 volts to the remote head outside. This would allow me to fish only one cable, instead of two 12/2 cables. A j-box in the ceiling would have power in, a 12/4 to the exit, and a 12/2 {low voltage) to the remote head.
mc cable
- Thread starter j.orlett
- Start date
- Status
- Location
- New Jersey
- Occupation
- Journeyman Electrician (retired)
Re: mc cable
It would depend on the classification of the 6 volt wiring. Class 2 or 3 wiring cannot be in the same cable as the power conductors. Look here for some similar info:
http://www.mikeholt.com/codeforum/ultimatebb.php?ubb=get_topic;f=11;t=009871
It would depend on the classification of the 6 volt wiring. Class 2 or 3 wiring cannot be in the same cable as the power conductors. Look here for some similar info:
http://www.mikeholt.com/codeforum/ultimatebb.php?ubb=get_topic;f=11;t=009871
chevyx92
Senior Member
- Location
- VA BCH, VA
Re: mc cable
What would be the classification, 1,2 or 3 then? And where are you basing your answer?
What would be the classification, 1,2 or 3 then? And where are you basing your answer?
- Location
- Massachusetts
Re: mc cable
It sounds like you would have normal and emergency wiring in the same cable.
IMO that is a violation of 700.9(B).
It sounds like you would have normal and emergency wiring in the same cable.
IMO that is a violation of 700.9(B).
- Location
- New Jersey
- Occupation
- Journeyman Electrician (retired)
Re: mc cable
That may be true. Unless of course the exit were fed by an emergency circuit to begin with.
- Location
- Massachusetts
Re: mc cable
Still a violation, you can only mix emergency circuits from the same source.
- Location
- New Jersey
- Occupation
- Journeyman Electrician (retired)
Re: mc cable
You're right. I was thinking of an EM fed exit sign with a slave attachment and no battery backup. Then I believe that the source would be the same. Next question is do they even make such a thing?
Bob,
You're right. I was thinking of an EM fed exit sign with a slave attachment and no battery backup. Then I believe that the source would be the same. Next question is do they even make such a thing?
chicar
Senior Member
- Location
- Lancaster,Pa
Re: mc cable
I would talk to my AHJ. Because of the difficulty involved in the job,he might let you do that.If you can do it with separate wires,than do it. As long as the wires are rated at 600V, I don't see no problem.
I would talk to my AHJ. Because of the difficulty involved in the job,he might let you do that.If you can do it with separate wires,than do it. As long as the wires are rated at 600V, I don't see no problem.
- Location
- Massachusetts
Re: mc cable
Along with 700.9(B) there is this at the end of 700.12(E) which applies to emergency battery units.Originally posted by chicar:
As long as the wires are rated at 600V, I don't see no problem.
chicar
Senior Member
- Location
- Lancaster,Pa
Re: mc cable
How about 700.9 exception .
How about 700.9 exception .
- Location
- Massachusetts
Re: mc cable
There are no exceptions.Originally posted by chicar:
How about 700.9 exception .
chicar
Senior Member
- Location
- Lancaster,Pa
Re: mc cable
700.9 unless otherwise permitted in [1] through [4].
700.9 unless otherwise permitted in [1] through [4].
- Location
- Massachusetts
Re: mc cable
[ February 27, 2006, 04:12 AM: Message edited by: iwire ]
Those are not exceptions but regardless, none of those rules allow sharing a raceway or cable.Originally posted by chicar:
700.9 unless otherwise permitted in [1] through [4].
[ February 27, 2006, 04:12 AM: Message edited by: iwire ]
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