ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Updated Forum Software
by Admin - 06/15/21 10:23 AM
Broken Outlet & Dangling Light
by LoneWolf - 06/14/21 08:21 PM
How's all our Non-US folks doing?
by C-H - 06/14/21 05:42 PM
Where is Everyone?
by Bill Addiss - 06/14/21 12:37 PM
Conduit over Vinyl Siding
by Bill Addiss - 06/14/21 12:35 PM
New in the Gallery:
2020 - 2021 Winter Project
2020 - 2021 Winter Project
by Bill Addiss, April 29
Garden 2021
Garden 2021
by Bill Addiss, April 26
Who's Online Now
1 members (Scott35), 40 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#98501 12/30/04 09:52 PM
Joined: Dec 2004
Posts: 46
T
ToHo Offline OP
Member
Hi... Just wanted some feed back on installing 2 ground rods for a residential service instead of 1 ground rod and the water main. Speaking with a inspector here in Rochester NY , he said they would prefer to see 2 ground rods. That was new to me.. anybody have a opinion on this subject... thanks ToHo

2017 / 2014 NEC & Related Books and Study Guides
#98502 12/30/04 10:20 PM
Joined: Apr 2004
Posts: 201
Member
Please read 250.50. It requires the water piping system to be used as a grounding electrode (assuming it is in contact with the earth for 10 ft or more) and another grounding electrode. If the additional grounding electrode is a driven electrode, a maximum of 25 ohms must be met or a second one must be driven no closer than 6 ft to the first one. [Linked Image]

- - - - - - - - - - - - - - - - - - - - - - - - - - -
Charlie Eldridge, Indianapolis, Utility Power Guy


Charlie Eldridge, Indianapolis Utility Power Guy
#98503 12/30/04 10:59 PM
Joined: Dec 2004
Posts: 46
T
ToHo Offline OP
Member
Thanks charlie... I agree 100%. Its always nice to get another view. If a well is used on the premise w/ pvc piping into the house. Would you use 2 ground rods or could you use only one if the ohms reading was acceptable?

#98504 12/31/04 01:42 AM
Joined: Dec 2004
Posts: 12
G
Member
You would be compliant with only one rod as long as the resistance is less than 25 ohms. Also, even though the waterpipe from the well is PVC, if the water system in the house is metallic, then it must still be bonded to the service. Not as an electrode, but to make it the same potential as the equipment grounds.

#98505 12/31/04 09:53 AM
Joined: Apr 2004
Posts: 201
Member
Gary, I agree completely. [Linked Image]


Charlie Eldridge, Indianapolis Utility Power Guy

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Vlado
Vlado
Croatia
Posts: 28
Joined: February 2011
Top Posters(30 Days)
Admin 14
Trumpy 10
Popular Topics(Views)
280,364 Are you busy
213,440 Re: Forum
200,360 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5