The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Son of Sparky
by HotLine1
Yesterday at 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
230 or 345 kV transmission lines?
by annemarie1
10/12/16 01:23 PM
Is this a fix or just a bandaid?
by gfretwell
10/10/16 06:49 PM
New in the Gallery:
12.5A through 0.75mm² flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 11
renosteinke 6
HotLine1 6
ghost307 5
sparky 4
Who's Online
0 registered (), 107 Guests and 7 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#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?

Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

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

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

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

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.


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals