Redheads on MC cable


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Old 04-25-15, 06:16 PM
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Redheads on MC cable

I know anti-short bushings (redheads) are not required on MC cable as the plastic wrap and listed MC connectors are sufficient cable protection...

That being said if I were to use them, would I use the same size as the wire designation (e.g. #0 for both 12-2 AC and 12-2 MC) or up-size by one due to the full size EGC (#1 for 12-2 MC and 12-3 AC)?
 
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Old 04-25-15, 06:26 PM
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I would go the next size up as you have 3 #12 wires.
 
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Old 04-25-15, 06:58 PM
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I know anti-short bushings (redheads) are not required on MC cable
I agree, but there are a lot of "Electricians" out there who would argue that point with you. Every electrician I know uses them and I think it is a not a bad thing to do and in fact, a good practice.

I would go the next size up as you have 3 #12 wires.
Agree.
 
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Old 04-25-15, 11:20 PM
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Most of the union guys I watch do not use them. I always use bushings on any metal clad cable.
 
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Old 04-26-15, 07:06 AM
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I do not use them for MC cable, it's not required. In fact, manufactures of MCAP do not provide them with a roll like they do/did with regular MC with an insulated ground. (Not union FYI ) I have never had an issue except when an apprentice was tightening the cable connectors too much. That was a training issue.
 

Last edited by Tolyn Ironhand; 04-26-15 at 07:54 AM.
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Old 04-26-15, 10:07 AM
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I always use read heads unless I'm using the push-in style MC connectors which have them built in. While it's not required, I consider it good practice.
 
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Old 04-26-15, 01:18 PM
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After-action report:

12-2 MCap (#10 aluminum bare ground): the #0 for 12-2 AC seems to be about right.
For 12-3 MC (green insulated ground), the manufacturer supplied #1's which also seems just right.

I used redheads with the saddle grip style connectors (SG38AST and SG3838AST) but with the 38ASTs, the three prongs that grip the armor just tore the redheads up.
 
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Old 04-26-15, 01:44 PM
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Arlington SG38AST are my connector of choice, except for fishing walls. The 38AST's are OK but I like to use them with Corra Clad type MC cable. With that type of able it would be almost imposable to use red heads.
 
 

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