2nd October 2019


What is the difference between MC and BX cable?

BX is not defined as a term by the NEC and is technically called AC (armored cable). The biggest difference between the two cable systems is that MC has full size ground wire while AC uses a combination of the jacket and a thin bonding strip or wire to function as the equipment ground.

In respect to this, what does the electrical term BX stand for?

Basic armored cable was developed in the early 1900s by Edwin Greenfield and Gus Johnson, who called their product BX cable. It has become a generic term for all armored cable. Some of the prevailing attitudes about the product most likely stem from imperfections inherent in the original BX.
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