Question on 220V A/c outlet
"Metspitzer" wrote in message
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On Fri, 1 Apr 2011 19:56:33 -0400, "RBM" wrote:
wrote in message
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On Fri, 1 Apr 2011 18:31:03 -0400, "RBM" wrote:
"Mikepier" wrote in message
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** MC cable has an additional copper ground conductor-
Yes, that is known as MC lite with the aluminum clad . But the old BX
relied on the steel clad for a ground.
** and the new BX (AC) lite relies on it's aluminum shield for it's
ground.
All but the very oldest BX cable had a flat bonding conductor inside
that was to be used, NOT the sheath.
The new BX (plastic insulated cable instead of rubber, with "raffia"
liner) virtually all had a bare copper ground.
Now, to get down to the real differences on CURRENT spiral wound
metallic sheithed cable.
There are 3 basic types, MC, AC, and MC/AP
MC has an insulated green or green and yellow ground.
AC has a bare copper ground.
MC/AP has a full sized copper ground wire attached full length to the
sheath, allowing the sheath to be used as safety ground - but that
wire is cut flush with the sheath and REQUIRES special connectors
where the cable enters the metal box.
I don't know where you come up with your nonsense. For one thing, the
bonding wire inside some AC cable was to assure a fault current path, and
was never connected to anything .
I was always told that the bond wire was not for fault current. It
was to short the coils of steel so there were no induced current, but
I was not able to find a cite faster than I lost interest.
** You are exactly right. It lays across the coils of the cable to assure a
straight path for any fault current
I have several coils of AC cable in my truck, none of which have a
grounding
conductor, copper, or otherwise, insulated or bare.
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