Back-wired (only!) outlets stamped "CU-AL"

Originally Posted By: Joey D’Adamo
This post was automatically imported from our archived forum.



Hey…


I wish I thought to take a picture, but I finally saw what the back of these type of outlets looks like:

http://joey.calgarysfinest.net/original_outlets.jpg

All there is are back-wiring holes... four sets of two... a set for 12 gauge and a set for 14 gauge. Nothing else except a strip gage.

I was under the impression back-wired devices never existed for aluminum wiring... here's one that's ONLY back-wired!!

What's even more surprising is there's a plethora of them in this apartment and they don't show a single sign of problems... my understanding is that it would be quite rare to see a bunch of outlets back-wired with aluminum remain problem free for 31 years...

Anyone ever came across these before? What's the verdict..?

In fact, as an aside, the original switches are the old GE "rocker" type switches and those were never rated for AL at all, IMHO... and those aren't showing signs of problems either...


Originally Posted By: jmcginnis
This post was automatically imported from our archived forum.



Joey…


I guess there’s something to be said for LUCK!!


Originally Posted By: Greg Fretwell
This post was automatically imported from our archived forum.



When you consider the mechanism of failure for aluminum (expansion rate) a spring contact is probably better than a screw.


Originally Posted By: Joey D’Adamo
This post was automatically imported from our archived forum.



Hey this is “Post-1972” aluminum wire… could that be the difference?


Plus its not a romex type cable... its THHN/THWN style run through conduit...

Perhaps the wire quality is better?