Aluminum wiring cause outlet to spark
We were called out to this home because the outlet started to
spark. This is a scary situation for any homeowner. This home was built in the
1960. I was wired with Aluminum wires.
The owner removed the outlet and smartly called us (Electricians)
into to look at the situation. This is a picture of the electrical box
when we arrived at the home. Aluminum wires look like modern wires
accept the metal is silver instead of gold. The wires are slightly thicker then
copper wire and much lighter. Aluminum is a
much softener wire then copper. If it
is handled incorrectly the wire can fatigue and break. It
also corrodes differently than copper. This is a problem when attaching AL wire
to electrical equipment that was designed for CU.
Aluminum wiring was only use for a short time in
the 1960 during a copper shortage. At that time it was a
cost effective solution for new houses. Now some 50 years later
we recommend that this wire be removed. The wire becomes more
dangerous as it ages. Al corrodes and
weeks much faster than CU. A 50
year old piece of Al wire can be broken by hand without any tools.
I wired many homes with aluminum in the 1970's when i first started in the trade,now going back to repair and replace. at one time there were al only receps and switches and we never had callbacks on them have seen most all the burnt up receps and wires, what was worse they actually used it in the mobile homes of the era too ! talk about a fire trap.
ReplyDeleteDespite the blown wires that look like have been shorted, the open ended current is still active. It is best that we exercise caution on this one.
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