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How to Identify Aluminum Wiring in Your Home
You can identify aluminum wiring in your home by checking your electrical panel or inspecting cables running through your home’s attic or basement or between open floor joists. The wires are marked AL, ALUM, or ALUMINUM, this is an indication of aluminum wiring.
#aluminum_wiring
https://acelectrical.ca/ac-ele....ctrical-how-to-ident

AC Electrical.pdf