11-05-2007, 12:47 AM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 3,887
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voltage drop doesn't come into play until 100 feet and then it's no more than a 3% voltage drop per one hundred feet increments. the armored cable is like a big bx cable. no, you don't need conduit for it. the metal braid is used for an equipment ground and mechanical protection. if you are nailing to the joist face use two hole greenfield straps.
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