Aluminum wiring for lighting and outlets in gauges 12 for 15 amp and 10 for
20 amp was used off and on, I believe until the seventies. Its still very
popular in larger sizes
You can install GFCI protection at the head of a non grounded outlet circuit
to protect outlets on its load side, then replace the load side outlets with
grounding outlets(three prong) and mark them " GFCI protected, no grounding
conductor) labels are usually included with the GFCI device. This will
protect people, but not devices that require grounding


"Liza Rhoades" wrote in message
...
Looking at a 1957 rancher. Was aluminum wiring common in the 50's.? I
will check it out further myself.

And...Most of the outlets are 2 prong. If I put a GFI at the head of
the curcuit will that protect the downstream outlets so I can replace
with 3 prong?

Thanks for any input. Will return later to check any replies.