I have had good life (30+ years) out of aluminum wiring for medium (13.8kv, 4160v, 2300v) and low voltage (480v) power distribution wiring. I would not recommend the use of aluminum wiring for 120 volt distribution in residential, office buildings, or in machine control wiring. As to the concern for IR surviellance, it is a valid point, switchboards and cable connections should be IR surveyed at least yearly, but this IR survey requirement also applies to copper. I have not had any more problems with aluminum wound transformers than copper wound, Tim
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