The biggest issue with copper clad aluminum (CCA) is that it corrodes a lot faster than a pure copper conductor. Especially in wet environments.
Aluminum also carries less current (has higher resistance) than the same diameter copper, but that can be engineered out by using a larger diameter. The corrosion problem... Not so easy to engineer away.
According to the Consumer Product Safety Commission (CPSC), properties installed with aluminum conductors manufactured before 1972, are 55 times more likely to have faulty and fire hazard-deemed connections than a property wired with copper.
https://www.electricmauinui.com/older-hawaii-homes-and-aluminum-wiring/
Threads like this are too few and far between on AN - I appreciate OP’s willingness to share and sympathize with his situation. Some good advice here as well.
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