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#920863 - 08/12/17 12:24 AM Joining Aluminum and Copper Wires
RCovell Offline
Carpal Tunnel

Registered: 09/27/03
Posts: 6501
Loc: Jayhawk Land
Was helping a friend diagnose an electrical problem today. He has aluminum wiring in his condo.

We discovered a GFCI receptacle and some connecting wires that showed heat damage. He's going to replace the receptacle but we disagreed on how to connect copper pigtails to the aluminum house wiring. He wants to use anti-oxidation grease squirted into a wire nut to connect. I'm thinking that's not approved.

Can anybody enlighten me on current best practice for joining aluminum and copper wire in a residential setting?

Thanks, Bob.

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#920868 - 08/12/17 07:19 AM Re: Joining Aluminum and Copper Wires [Re: RCovell]
jdevlin Offline
Carpal Tunnel

Registered: 09/09/02
Posts: 9579
Loc: Welland Ont. Canada
There are special alum to cop wire nuts. I believe they are purple.

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#920869 - 08/12/17 07:30 AM Re: Joining Aluminum and Copper Wires [Re: RCovell]
AnthraciteSparky Offline
Handyman

Registered: 12/18/14
Posts: 663
Loc: Central Pennsylvania
What jdevlin said. They are called AlumiConn Al/Cu connectors. According to their website those connectors are the only UL approved connection method. And yes, they are salty !
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