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Re: What would you do?
I think rubber insulation went out in the 1940s with the development of thermoplastics.
When rubber insulation went out, so did tinned copper - no need to tin the copper with thermoplastic insulation.
A 1970s house would either be:
a) copper
b) aluminum
c) copper clad aluminum (which looks like copper - so I know you did not have that)
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