jack chain to concrete ceiling

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I really don't think the Code Panel had this in mind when they wrote it... The first thing that comes to mind when I read this article is a chandelier with wire running thru the chain...
 
wireman3736 said:
I have never been sited for this, where would I find this restriction.:-?
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I don't have my code book handy, but I believe we're also restricted to 6 feet max length on the fixture whips.
 
iwire said:
I can't see that happening on most of the jobs, the ceiling guy would tell likely tell us 'fogeda aboud it'.
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Not if it was spec'ed for them to do so. ;)

A GC I used to do a lot of work with had it sort of boiler plated into the pricing to shoot wire at the coner of lights, unfortunately all the rest we had to shoot ourselves.
 
I guess my choices for the wire drops are some kind of rubber cord (SJ or SO)rated for 20 amps, stranded 12-2 MC if I can find it or 1/2 inch greenfield with #12 stranded thhn. The drops will be about 8-10 feet long.
 
iwire said:
I think it is exactly what they had in mind.

I have no idea which one of us is right.:smile:
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The only reason I have doubts, is that ART 410.28 is about protection of conductors and insulation, well if MC is not enough protection for conductors then I guess I'm at a loss...
 
stickboy1375 said:
The only reason I have doubts, is that ART 410.28 is about protection of conductors and insulation, well if MC is not enough protection for conductors then I guess I'm at a loss...
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Stickboy I'm with you on this. I can see where using solid conductors run through a fixture chain could make a mess and create a hazard but I can't imagine MC with solid conductors causing any problems. The MC cable will take a lot more abuse during installation than it ever will once it's installed.
 
I don't think it's a misinterpretation as much as it is just the wording itself, an inspector could certainly cite solid conductors in MC, AC, FMC, etc... as being in violation of the article section as it is worded whether it is the intent or not.

Roger
 
mkgrady said:
I guess my choices for the wire drops are some kind of rubber cord (SJ or SO)rated for 20 amps, stranded 12-2 MC if I can find it or 1/2 inch greenfield with #12 stranded thhn. The drops will be about 8-10 feet long.
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Well, I would use 3/8 greenfield with #12 stranded wire. That's exactly what I did, just a couple of weeks ago. I also made sure to locate the outlet boxes within 6' of the fixture. I see now, after re-rereading the book that I was in error. I was thinking of 410.67(C), which applies to tap conductors and limits them to 6' max. It does not apply to branch circuit conductors. But then again, are they tap conductors that run from the outlet box and terminate in the fixture? Or are they branch circuit conductors?
I agree that 410.28(E) prohibits solid wire for this application.
 
JES2727 said:
Well, I would use 3/8 greenfield with #12 stranded wire. That's exactly what I did, just a couple of weeks ago. I also made sure to locate the outlet boxes within 6' of the fixture. I see now, after re-rereading the book that I was in error. I was thinking of 410.67(C), which applies to tap conductors and limits them to 6' max. It does not apply to branch circuit conductors. But then again, are they tap conductors that run from the outlet box and terminate in the fixture? Or are they branch circuit conductors?
I agree that 410.28(E) prohibits solid wire for this application.
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Although branch circuit conductors have no length limit, 3/8" FMC has a limit of 6'. For a longer whip you would need to use 1/2" or larger.
 
infinity said:
Although branch circuit conductors have no length limit, 3/8" FMC has a limit of 6'. For a longer whip you would need to use 1/2" or larger.
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Do the rules for 12/2 MC (black/white/green) and 3/8" FMC with #12 (black/white/green) conductors differ?
 
LarryFine said:
Do the rules for 12/2 MC (black/white/green) and 3/8" FMC with #12 (black/white/green) conductors differ?
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Yes they do, see article 330 and then 348.20.

Roger
 
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