Cu. to Alum. connections

[wayne123]

What is the most common way to make a copper to aluminum connection. The reason I ask is because I just installed cooktop in a house and I pulled #6/3 WG aluminum from the panel. When the cooktop arrived it had copper wiring in it. I went to the supply house to buy some CU/AL wirenuts to make the connection and found out they don't make CU/AL wirenuts big enough for this application. I used CU/AL split bolts. Does anyone know if they make wirenuts that big?

 

[electricman2]

Re: Cu. to Alum. connections

Ilsco makes a butt type set screw splice Listed for AL/CU conductors that works well. The SPA-2 will accept #6 conductors. It is rated 90C.

 

[Guest]

Re: Cu. to Alum. connections

You can use CU/AL inline crimp-on butt-splices (insulated or non-insulated) but they take up a lot of real estate in the J-box.

Here's CU/AL wire nuts, but they only go up to #10:
http://www.hudsonfasteners.com/wire_nut/wn_twister_alcu.htm

 

[electricmanscott]

Re: Cu. to Alum. connections

I think split bolts were they way to go here. Good choice.