ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
New tool
by gfretwell - 10/19/20 03:43 PM
Where is Everyone?
by Bill Addiss - 10/17/20 07:04 PM
Beyond Belief
by gfretwell - 09/27/20 12:03 AM
Questioning the electrical norms
by LongRunner - 09/23/20 06:38 AM
Smoke & mirrors?
by HotLine1 - 09/21/20 03:42 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 10 guests, and 19 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
UFER ? #77546 06/20/01 10:19 PM
Joined: Dec 2000
Posts: 4,283
electure Offline OP
Member
In 2 cities right next to each other, Ufers are required to be installed in 2 different ways. One inspector wants the Cu tie wired right to the rebar. The other wants the Cu totally away from the rebar in the footing, but bonded together above the slab. Up until now I just have tried to remember which guy's city I'm working in.
Who's right???

[This message has been edited by electure (edited 06-20-2001).]

2017 / 2014 NEC & Related Books and Study Guides
Re: UFER ? #77547 06/20/01 10:53 PM
A
Anonymous
Unregistered
I think Ufer himself allowed the copper to be under the concrete. But in a wet area, the copper could possibly corrode away.

The place that is right is the one that requires a stainless steel rod to be welded to the rebar and left sticking out for the purpose of attaching the copper GEC.

Re: UFER ? #77548 06/21/01 06:31 AM
Joined: Oct 2000
Posts: 5,389
S
sparky Offline
Member
what is the rationale? is the voltage gradient affected either way?

Re: UFER ? #77549 06/21/01 01:25 PM
Joined: May 2001
Posts: 176
W
WARREN1 Offline
Member
Searched "Ufer" and got an article published by Chris Scott in December of 1989 in Radio World magazine. According to the article, Mr. Ufer's findings were published in IEEE Transaction paper #63-1505.
"After much research and testing Mr. Ufer advised the Army to make connection to the steel bar that would internally reinforce the concrete foundation. He had determined that concrete was more conductive than all but the best soil, and that this improved semiconducting characteristic would enhance surface area contact with the surrounding soil. The wire ties normally used would be extra secure, and attention would be given to bonding or welding the lattice- type network together." We use this type system often doing design. The cage is wired together and a piece of CU is brought out to the steel column. This is all tied to the building ground loop, etc, to have a better than adequate grounding system.


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

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

 

Member Spotlight
The_Lightman
The_Lightman
Orlando, Fl, USA
Posts: 49
Joined: August 2001
Show All Member Profiles 
Top Posters(30 Days)
BigB 3
Popular Topics(Views)
270,700 Are you busy
204,939 Re: Forum
193,051 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3