Ufer earth:

[Tony S]

Ufer earth:

I didn’t want hijack http://forums.mikeholt.com/showthread.php?t=192662

Ufer earthing is now in BS7671. In my early days in the trade as an apprentice we built a new substation. The rebar was cad-welded to 1 x ⅛ copper tapes around the foundations. In the above thread mention is made of clamps that can be used in place of cad-welding, has anyone got a link to these clamps?

I can foresee a problem with this new BS regulation, mainly the builders wanting to get the slab finished and the electrician showing up two days later.

BS = Male Bovine Exciment.

 

[Adamjamma]

Check with Rexel... know they have them in USA market and believe they can source them.
Screwfix 80158 also works. I usually brush some vaseline over it, but it works.

 

[Tony S]

Thank you :thumbsup:

 

[cpinetree]

We use NSI G-1-SDBR

NSI Link: http://www.nsiindustries.com/catalog/nsiproducts/grounding/direct-burial-and-rebar-clamps/g-1-sdbr

Good for water, rods or rebar

 

[Mike01]

Compression Grounding

Compression Grounding

You can also utilize compression type [ https://app.burndy.com/solutions/grounding-superstore/compression-grounding ] this was the type I referred to in my previous post, even some local utilities are accepting these. Ironically after Don's post I went to discuss with a structural engineer and they mentioned they typically do not use the "weldable" re-bar. This from some googling if the sources are correct would be identified as such by the manufacturer and include a "W" in the listing indicating it is suitable for welding, it appears it all has to do with the carbon content of the rebar, I am no expert but found it interesting. I was also informed that structurally they account for the loss of strength in their design and selection, however I know of one site where they had to use multiple “shots” not sure what that does to the strength….

 

[tom baker]

I had in one of my grounding classes the electrician who made the ufer ground at the Satsop Nuclear Power Plant (never finished) He said it was a million cm wire with a 1000 cadweld shot. Lit the shot with a spark igniter taped to a long 2 x4

 

[al hildenbrand]

I had in one of my grounding classes the electrician who made the ufer ground at the Satsop Nuclear Power Plant (never finished) He said it was a million cm wire with a 1000 cadweld shot. Lit the shot with a spark igniter taped to a long 2 x4

Boy Howdy ! ! Now there's an image ! :lol:

 

[Tony S]

I had in one of my grounding classes the electrician who made the ufer ground at the Satsop Nuclear Power Plant (never finished) He said it was a million cm wire with a 1000 cadweld shot. Lit the shot with a spark igniter taped to a long 2 x4

OK, I'm now officially confused.

 

[LarryFine]

OK, I'm now officially confused.

About the 1,000 mcm conductor or the remote sparker?