Aluminum MC - Electrician Talk - Professional Electrical Contractors Forum

mikewardjr · 04-05-2011, 09:25 AM

Is all mc aluminum now? I do mostly residential. so I don't use much. Are there any restrictions on aluminum besides not being able to use the set screw connectors? Out will be installed in a restaurant.

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erics37 · 04-05-2011, 09:33 AM

I've never used non-aluminum MC cable, so I don't know.

And if your connectors are listed and suitable for use on MC then there shouldn't be any issue in using them.

jwjrw · 04-05-2011, 10:04 AM

Are you talking large feeder size or branch circuit size conductors? You see a lot more large AL MC now days but they still make copper as far as I know.

erics37 · 04-05-2011, 10:05 AM

Wait... are you talking about the conductors, or the jacket?

jwjrw · 04-05-2011, 10:10 AM

Quote:

Originally Posted by erics37

Wait... are you talking about the conductors, or the jacket?

He may be talking about the jacket. I missed what he asked about the connectors.

Wiredude · 04-05-2011, 12:31 PM

Sounds to me like he wants to know if he can use the old set-screw style BX connectors for modern Al jacket MC. I know you're not supposed to, not sure if it would be acceptable if you had some of the "McTuff" steel-jacket MC.

mikewardjr · 04-05-2011, 05:56 PM

Quote:

Originally Posted by Wiredude

Sounds to me like he wants to know if he can use the old set-screw style BX connectors for modern Al jacket MC. I know you're not supposed to, not sure if it would be acceptable if you had some of the "McTuff" steel-jacket MC.

Wire dude - yes thats what I meant.

Sorry I didn't add enough info. I meant copper wire with aluminum covering. I don't do much commercial.

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Shockdoc · 04-05-2011, 06:03 PM

I had used 4/0-4/0/-4/0-4/0-2 Al MC a couple years back for a commercial sub division. Great stuff at a great price to work with. I came in $20k cheaper than all the local guys bidding copper in EMT.