"dave" wrote in message
...
the aluminum stranded wires seem to be held in the 2 pole breakers (under
the screws) with BIGGER headed screws.

ARE those bigger-headed screws ONLY for use to hold in aluminum wire?

this image should make clear what I'm talking about (an extreme closeup)

http://www.image-upload.net/files/53...ews03final.jpg

thanks for advise,

toolie

The bigger set screws are to hold bigger conductors. All the terminals are
CU/AL