ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
twh 3
Recent Posts
Ceiling fan distance from outdoor hot tub
by gfretwell. 11/16/17 02:18 AM
diazed fuses
by Texas_Ranger. 11/13/17 03:02 PM
Theft deterrent alarm
by gfretwell. 11/12/17 01:39 PM
EEPROM errors on XC7Z010-2CLG225I chip
by twh. 11/07/17 05:45 PM
Blackened bare copper in panel ?
by twh. 11/04/17 11:16 AM
New in the Gallery:
Gallery Test
Popular Topics(Views)
242,566 Are you busy
178,738 Re: Forum
170,010 Need opinion
Who's Online Now
0 registered members (), 41 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#180811 - 09/11/08 03:11 PM Service Entrance Grounding  
thiggy  Offline
Member
Joined: May 2004
Posts: 24
B'ham Al
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?


Work Gear for Electricians and the Trades

#180812 - 09/11/08 03:30 PM Re: Service Entrance Grounding [Re: thiggy]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,135
Estero,Fl,usa
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


Member Spotlight
akmaster
akmaster
alaska
Posts: 70
Joined: June 2012
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.009s Queries: 15 (0.002s) Memory: 0.7436 MB (Peak: 0.8620 MB) Zlib enabled. Server Time: 2017-11-19 08:41:10 UTC