Originally Posted By: phinsperger
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I personally had a house for 7 years that was completly wired with alum. Never had a problem.
I agree that installation workmanship plays a big part. I also think that the use of the circuit also plays a big role.
As a greater load is placed on a circuit the wire warms up and the soft alum "squishes" itself a little bit between the screw and the terminal block. The greater the load the more the wire expands and "squishes". When the circuit is off the wire cools and shrinks leaving the wire microscopically smaller (between screw and terminal) than it was before. Repeatedly over time this causes the wire to become loose.
While several owners may have only had only a light and clock radio plugged into their bedroom outlet. Along comes the new owner who uses that room for an office with power bars for the computer, monitor, printer, fax, window a/c, etc. Suddenly the power draw on that circuit increases dramatically and the problem free life of that circuit is reduced.
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