This picture is a perfect example of the problems that are associated with Aluminum wiring. Note letters A and B (the insulation jackets are melted), which I will explain "Why" in the third paragraph and C (mixing copper wiring with aluminum wiring on the same breaker). Aluminum wiring can not be mixed with copper wiring and breakers can not be double tapped with two wires, unless designated by manufacturer and the breaker connnection will contain a special clip for double tapping. Aluminum wiring is very easy to identify due to it's obvious aluminum color. Aluminum wiring is not to be confused with tin coated copper which looks similar to aluminum wiring but aluminum wiring has distinguishing characteristics and is a solid conductor. During the 1970's, aluminum (instead of copper) wiring became quite popular and was extensively used throughout the United States. Since that time, aluminum wiring has been implicated in a number of house fires, which caused jurisdiction
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