Armored Cable Installation in a Breaker Cubicle

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snipes1855

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Location
Michigan
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Engineer
I am trying to figure out a solution for this issue. The installer has an armored cable that has ground conductors in a cabinet. It is grounded and terminated on one end at the transformer. However when the installer terminates the cable at the cabinet, is it safe for the installer to remove the ground conductors on the end when it is already grounded at the transformer? From my understanding, the copper shield is removed with the termination kit but the main question is can the ground conductors be removed without any issue? The installer is asking me the question and I don't want to give them bad information.
 
Is the cable like this one? :

https://www.okonite.com/media//catalog/product/files/2-22.pdf

On this cable type the three ground conductors are each close to all three phase conductors, but not exactly centered between them. And so I'd expect some circulating currents to occur in the ground conductors when they're joined at both ends, but the currents may be relatively small due to the symmetry in the cable geometry. Perhaps you could contact the manufacturer of the cable whether the circulating currents should be small enough to ignore for heating purposes if the grounds are joined at both ends.

I made a post relating to this a couple days ago:
https://forums.mikeholt.com/threads/current-on-a-34-5kv-concentric-neutral.2576765/#post-2870146
 
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