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Mike Moody 11-23-2011 06:17 PM

Replacing Duplex On House w/Aluminum Wiring
Any feedback would be appreciated on replacing inside duplex wall plug with aluminum wiring, house built in 1969, current wiring has short leads and I purchased 12-10 butt splices to use on short leads, using liquid no-lox and obviously romex 14/2 to other end of butt splice.
Any danger other than aluminum wiring?
Thanks Mike

darren 11-23-2011 06:31 PM

I wouldn't use butt splices, I can't say off the top of my head if there against code or not but I have never seen it done.

You have two options, buy aluminun rated plugs, but those are expensive.

Second option is to get aluminum to copper marrets. Put some no-ox on the joint as well and you will be good to go.

Billy_Bob 11-23-2011 06:57 PM

All about aluminum wiring repair from the U.S. Consumer Product Safety Commission...

AllanJ 11-24-2011 07:30 AM


J. V. 11-24-2011 11:45 AM

1 Attachment(s)
You cannot use anything that is not listed for AL to CU. The butt splices are not listed for this application. Use one these (pictured below) or use a AL/CU rated receptacle.

ben's plumbing 11-24-2011 11:54 AM

agree with darren don't use butt splices...and use only al/cu rated receptacle even if they do cost more safty is more important than cost ....

Billy_Bob 11-24-2011 11:57 AM

Also aluminum wire has a problem called "cold creep" (google aluminum wire cold creep). This means the wire will expand and contract with an electric load, then no electric load (heat, no heat)...

So aluminum wire is a slippery slimy little rascal which needs to be held FIRMLY in place! It must be "restrained" or it will escape!

Thus *very* important to read the full installation instructions. If these say to tighten the screws to a certain "inch pound" tightness using a torque wrench, then get the proper tools to do that. 12 inch pounds equals 1 foot pound. And if the instructions say to use a certain "anti-oxidation" compound and to first wire brush the wire or whatever, then VERY IMPORTANT to do that!

I think the copalum crimp method done by a certified electrician is the best.

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