ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Al Hildenbrand - Minneapolis - obituary
by Bill Addiss - 02/03/23 07:38 PM
Violation?
by renosteinke - 01/27/23 09:52 PM
Does NEC 551.71 (F) apply to dwellings?
by BigB - 01/20/23 10:46 AM
Power submeter connections
by HotLine1 - 01/19/23 09:09 AM
New in the Gallery:
Burger King crown sillyness
Burger King crown sillyness
by wa2ise, December 11
240/208 to a house
240/208 to a house
by wa2ise, October 9
Who's Online Now
0 members (), 40 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#180811 09/11/08 03:11 PM
Joined: May 2004
Posts: 24
T
thiggy Offline OP
Member
While examining my mother's fuse panel, I started wondering about the grounding system. Her house was built about 1960, and has a 100 amp fuse box on the inside basement wall, with a 100 amp cartridge fuse disconnect outside beside the meter. I noticed that the outside box has a bare ground wire which runs in to the fuse box, then up to the cold water copper tubing which runs above the fuse box. There is no ground rod driven into the soil. Is this an appropriate method of grounding the service panel? I wonder about the continuity of the copper plumbing, particularly where there is a pressure regulator in the line. Should this go to a ground rod in the soil rather than being clamped to the water system?

Joined: Jul 2004
Posts: 9,788
Likes: 14
G
Member
Back when all water distribution was metal that was the best grounding electrode. The whole city was tied to the same equipotential grid. Now that everything is plastic that is no longer true so we have the requirement for the supplemental electrode. I would drive a rod and connect it to the panel. If there is any question about the conductivty of the pressure regulator (not all metal body) jumper around it.


Greg Fretwell

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
 
* * * * * * *

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

 

Member Spotlight
electure
electure
Fullerton, CA USA
Posts: 4,291
Joined: December 2000
Top Posters(30 Days)
BigB 4
triple 3
Popular Topics(Views)
303,134 Are you busy
232,158 Re: Forum
216,886 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5