bond both ends of armoured cable?

[alitt001]

I can think of 2 instances where it is not practical to bond both ends. Is it nessesary to bond both ends of the armour?

What about in the case of emt?

[twh]

If it were necessary to bond both ends, wouldn't we need a bond bushing every place that reducer washers are used?

[electric-ed]

Generally, the armour of armoured cables "shall be mechanically and electrically continuous throughout" as required in 12-608.

However, where single-conductor AC is installed in such a manner as to prevent the flow of sheath currents, it should be "bonded to ground at the supply end only, and thereafter - - - - isolated from ground." 10-302(2)

Ed

[twh]

What about in the case of emt?

<font size="2" face="Verdana, Helvetica, sans-serif">No. Consider the situation where conduit is adapted to pvc. The end at the pvc adapter isn't separately bonded.