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Why can I use aluminum armored Type AC cables on a DC circuit?

April 26, 2017AC aluminum armored cables circuit dc type

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Why can I use aluminum armored Type AC cables on a DC circuit?

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U.L. has not approved aluminum armored Type AC cable for use on DC circuits. During the extreme testing procedures conducted by U.L., a conductor was energized to arc and caused the aluminum to burn. Normal usage would be 12DC or 24DC, but U.L. has not tested the cable under those conditions. Steel armored Type MC cable may be used on DC Circuits without exception.