BX (AC?) bonding wire

[giddonah]

If the wire is in "constant contact" with the armor, and the cable is in contact with the box, why are you not supposed to bring the bonding wire inside the box? What difference does it make?

And when wiring a recepticle with it, I take it you're just supposed to pigtail the ground to the box (thus grounded through the armor)?

[Sparks]

You wouldn't bring it into the box because for one, it's unnecessary, two, it might confuse people and they may think it's a ground wire I guess. Oh and three, you better be using anti-shorts (the red things that protect the conductors from the bx armor) and the bonding wire goes over the anti-short and then gets wrapped around the armor, this holds the anti-short in the armor nicely when your installing the bx connector. The device ground wire would then be attached to the metal box unless you are using self-grounding devices or receptacles, in that case you would remove the screw retainer (insulating qualities) and screw the device tightly to the metal box. The bond wire ensures a low impedance fault path to clear a fault. The bx armor is coiled and would provide too much impedance due to capacitive effects and the like, which I'm sure you're aware, just saying it in case someone else doesn't know this. Making sure all screws are tight on bx wiring is crucial to it's grounding effectiveness, just like conduit without a grounding wire. By the way, the cd worked great, no problems, thanks.

[giddonah]

thanks for the info. I'm glad the cd worked for you too, I was wondering how that went.