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Bx cable

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  1. #1
    mike1 started this thread.
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    Bx cable

    Found a small amount of bx cable first ever. So i was wondering i found some with 3 wires and some with5 wires it seems to me that 5 wire isnt common im assuming most bx is solid wire but i did find some with 3 stranded wires will it affect recovery rate? I noticed the 5 wire bx is bigger than the 3 wire. Im assuming its ali bx cause i doubt i could bend it to see the wires then snip the metal off to get the wires out without cutting them. I only probably have 5lbs bx not sure have to weigh it out looks like i got 14 and 12awg does it come in 10awg and bigger? Whats recovery on these?



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    Bx has wildly different recovery depending on:


    • If the shielding is aluminum or steel
    • If the wire inside is insulated aluminum, ICW #1 MCM, ICW %1 75-80%, ICW #2 50% or steel coax


    Currently I don't buy or sell much bx wire but at my last job where I did, aluminum bx wire we bought at the same price as #2 ICW 50% and steel bx at ICW #2 35%. This was under the impression that it was all 75-80%. A contract I had a few years ago about 2/3 of the bx had 75-80% wire and most of the rest was split between coax, 50% and small amounts of insulated aluminum.

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    Well looks like i only got bout 10lbs with the bx beingaluminum casing and copper wire havent done it yet im gona say its 50% recovery? So id get 5lbs bare wire and 5lbs aluminum will update when i break it down fully.

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    Actual recovery will not be 50%/50% (wire insulation, etc.) but the value should be roughly the same or a bit better than 50% wire. Think of it like romex with the second layer being much heavier than usual

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    Its kind of hard to get a true % rate from BX cause its all made different. Depending how old it is, and the thickness of the wire and the insulation used. There could also be a thick paper insulation around the wires and sometimes a aluminum line going threw that makes it very difficult to get out the wire. Especially if the paper soaked up any moisture. It will swell and clog up the bx and you cant pull it threw.

    The newer alum stuff has a clear plastic sheath around the wires and usually slides right out pretty easily.
    Last edited by greytruck; 02-11-2021 at 07:21 PM.



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