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supplemental grounding #216614 01/05/16 01:35 AM
Joined: Mar 2005
Posts: 236
watersparkfalls Offline OP
Member
OK I feel like I should know this off the top of my head, but I am drawing a blank. First question is simply "Can the supplemental grounding electrode conductor go from panel to first ground rod and from that first ground rod to the second in two separate pieces of wire?" In other words use 4 acorns and 2 separate pieces of wire. And secondly when installing a 400 amp service with 2 qty 200 amp panels can I run from the ground rods to the first panel and then unbroken to the second panel/ Or does each service require its own supplemental grounding conductor?

Thanks,
H20

2017 / 2014 NEC & Related Books and Study Guides
Re: supplemental grounding [Re: watersparkfalls] #216615 01/05/16 01:38 AM
Joined: Jul 2004
Posts: 9,577
G
gfretwell Offline
Member
Yes, you can splice to a supplemental electrode

From the handbook

[Linked Image from gfretwell.com]

BTW does anyone see the anomaly in the code, demonstrated in the exhibit.


Greg Fretwell
Re: supplemental grounding [Re: watersparkfalls] #216625 01/07/16 12:29 AM
Joined: Mar 2003
Posts: 849
Y
Yoopersup Offline
Member
Yes, you can splice to a supplemental electrode

Ist you MUST make sure it is a supplemental Grounding Conductor not required by Code.

See 250.52./250.53/ 250.64

Splicing 250.64 C

Taping 250.64 D


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