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#35281 - 03/07/04 05:37 AM grounding 4160v circuit
jackman435 Offline
Junior Member

Registered: 12/17/03
Posts: 2
Loc: phila.,pa.
we are installing a 5kv S&C sw. that is feeding a 4160 - 480v transformer. my question is, does the equip. ground con. from transformer back to s&c sw. have to be rated for 5000v, or would 600v wire be ok?

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#35282 - 03/07/04 08:35 AM Re: grounding 4160v circuit
Nick Offline
Member

Registered: 08/13/01
Posts: 603
Loc: Riverside, CA
600V insulation or bare is OK.

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#35283 - 03/07/04 12:36 PM Re: grounding 4160v circuit
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
I agree with Nick. It’s routine for equipment-grounding/bonding conductors in medium-voltage systems to be relatively large compared to phase conductors, like in the 2/0-4/0 AWG size.

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