MC excess coiled above ceiling??

[ssandoval]

Gentlemen,

Anything inherently wrong with coiling excess lengths of MC above ceiling? They are being used for general branch circuit wiring and the coils are supported, but does anyone think we could have some induction issues here?

 

[mxslick]

Good question....I don't think there would be any induction issues (unless you're talking about 30-50 feet in the coils) and I don't think there is any Code restrictions.

I would love to know the answer from our engineers and others who have deeper technical knowledge.

 

[firemandave]

firemandave

firemandave

I would think that any magnetic fields would be canceled because inside each cable there is current flowing in both directions. However, you could have some problems with heating because of inadequate spacing.

 

[iwire]

I would think that any magnetic fields would be canceled because inside each cable there is current flowing in both directions.

I agree 100%, there will be no 'induction' from a coil of MC.

 

[jumper]

It seems like many of the big box stores always have loops of MC up in the ceiling. I cannot see it as violation.

 

[iwire]

It seems like many of the big box stores always have loops of MC up in the ceiling. I cannot see it as violation.

They use manufactured wiring systems in the stores. Precut and equipped with plugs and receptacles on each end, they plug right into the lights. You pretty much have to coil the excess.

 

[jumper]

They use manufactured wiring systems in the stores. Precut and equipped with plugs and receptacles on each end, they plug right into the lights. You pretty much have to coil the excess.

Did not know that. I have wired a few few Food Lions, but we did not install anything like that.

 

[wireguru]

Did not know that. I have wired a few few Food Lions, but we did not install anything like that.

here's that product http://www.relocwiring.com/Default.aspx

 

[jumper]

here's that product http://www.relocwiring.com/Default.aspx

Yeah, that is it I believe, I cannot see it clearly from the floor, but that looks like it.

 

[jeremysterling]

Here in Austin, we have a local municipal ordinance prohibiting coiling excess MC. MC must be cut to length.

But by looking around at most open ceiling retail stores around here, I would say it is rarely enforced.:roll:

 

[wireguru]

Here in Austin, we have a local municipal ordinance prohibiting coiling excess MC. MC must be cut to length.

But by looking around at most open ceiling retail stores around here, I would say it is rarely enforced.:roll:

reloc is a listed system, not MC installed by a contractor so I would say that ordinance wouldnt apply.

 

[iwire]

Here in Austin, we have a local municipal ordinance prohibiting coiling excess MC.

Have you actually seen this ridiculous requirement or just been told it exists?

 

[PetrosA]

Is the MC not going to heat up because the jacket acts as a shield? I know that romex and extension cords will heat up. I once met a pool installer who had his extension cord coiled up inside of a 5 gal. bucket with the male end poked out of a hole at the bottom. It was an easy way for him to store the cord and he had all his crews do the same thing. I told him it was dangerous and to stick his hand in the bucket and feel the heat coming off of the cord as he was testing a pump. That was the last time he ever used the bucket for that

 

[mattsilkwood]

They have a local amendment here that doesn't allow mc, period.
It was a huge fight to be allowed to use reloc.