ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Old motor connections
by suzannemiller - 09/28/21 02:53 AM
How's all our Non-US folks doing?
by grich - 09/27/21 11:59 AM
Well I am back to stay (nearly 6 years)
by Bill Addiss - 09/26/21 11:09 PM
nec 110.3 (B)
by HotLine1 - 09/26/21 03:42 PM
New in the Gallery:
Now you know.
Now you know.
by Tom_Horne, September 7
February, North East Indiana
February, North East Indiana
by timmp, July 25
Who's Online Now
1 members (Scott35), 39 guests, and 17 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Feb 2006
Posts: 138
P
Member
I've got a municipal project that needs to have the earth ground resistance measured using the fall-of-potential method.

From what i can determine this takes a meter with a couple of probes to stick in the ground at specific distances from the ground ring. Aside from that type of device (like a Fluke 1625), they make a earth ground tester that is a clamp on tester. I realize that the clamp on testor won't give me a fall-in-potential measurement but is there a major difference in the two types of testors?




Joined: Jun 2004
Posts: 1,273
T
Member


Tesla
Joined: Apr 2002
Posts: 7,282
Likes: 3
Member
Tesla:

Thanks for the nice informational link!!!


John
Joined: Nov 2007
Posts: 763
K
Member
I looked into getting one of the clamp on ground testers a few years back, but after I read up on them, I wasn’t confident about the accuracy or if it would do what was needed, so I opted for a traditional 3-point tester kit instead. They may have made improvements to them since then though.
The Tech Tips pdf below sort of hits on some of the things I was reading about back then.

Clamp on Method

Joined: Feb 2006
Posts: 138
P
Member
Great article on the diffences.

I've decided to rent the Fluke 1625 for a couple hundred bucks.

Joined: Jun 2001
Posts: 642
N
Member
It's been a while since I have been here, Just completed aroject where every building had to have the grounds tested. We used an EXTECH 3 point ground tester. Cost for a new one is about $180.00
Not as fancy or as capable as the fluke referenced above but good enough to test grounding before power is applied. The model we used instructions said not to be used if voltage tested above 10 volts


ed
Joined: Mar 2007
Posts: 101
M
Member
I used that EXTECH 3 point meter on a distribution system for a eye glass manufacturer the equipment purchased was from Germany. That meter worked really well.


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
pcsailor
pcsailor
Minneapolis, MN, USA
Posts: 21
Joined: September 2019
Top Posters(30 Days)
timmp 3
Popular Topics(Views)
283,621 Are you busy
216,894 Re: Forum
203,239 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5