ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
"Esoteric" countries and their wiring practices?
by Texas_Ranger. 04/20/19 07:00 PM
Norwegian power?
by Texas_Ranger. 04/20/19 06:27 PM
Welded Copper Connections
by gfretwell. 04/19/19 04:46 PM
Israel
by annemarie1. 04/18/19 02:35 PM
Water heater calculationsSo when I count calculati
by watersparkfalls. 04/13/19 12:43 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 2 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Ground rod & water main #98501
12/30/04 09:52 PM
12/30/04 09:52 PM
T
ToHo  Offline OP
Member
Joined: Dec 2004
Posts: 46
N.Y.
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
Re: Ground rod & water main #98502
12/30/04 10:20 PM
12/30/04 10:20 PM
C
CharlieE  Offline
Member
Joined: Apr 2004
Posts: 200
Indianapolis
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
Re: Ground rod & water main #98503
12/30/04 10:59 PM
12/30/04 10:59 PM
T
ToHo  Offline OP
Member
Joined: Dec 2004
Posts: 46
N.Y.
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?

Re: Ground rod & water main #98504
12/31/04 01:42 AM
12/31/04 01:42 AM
G
Gary S  Offline
Member
Joined: Dec 2004
Posts: 12
Houston, Texas, USA
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.

Re: Ground rod & water main #98505
12/31/04 09:53 AM
12/31/04 09:53 AM
C
CharlieE  Offline
Member
Joined: Apr 2004
Posts: 200
Indianapolis
Gary, I agree completely. [Linked Image]


Charlie Eldridge, Indianapolis Utility Power Guy

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
MarkC10
MarkC10
CA, Inland Empire
Posts: 43
Joined: September 2013
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
254,506 Are you busy
190,743 Re: Forum
180,465 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.156s Queries: 14 (0.142s) Memory: 0.9673 MB (Peak: 1.1059 MB) Zlib enabled. Server Time: 2019-04-21 08:23:48 UTC