[TheForge] Grounding Points in Concrete Floors

[Ralph Sproul]

Hi Bill, When you put the steel runners (leg down channel) onto the job you
raise it to floor level with stand offs made from steel scraps or rebar.
The runner(s) should be set to the finished floor height with a transit or
good level and then run a ground cable from the steel runners to the wall
(that's how I've done it anyway and it's working out).

I don't imagine there'd be anything wrong with rerod used as a ground
conductor - clamping the cable to it above floor level where they'd be rust
would be your biggest problem I'd see with your proposed method.

I also don't think the rod would get hot enough to bother anything unless
you were air arcing 8 hours a day - then things'd get warm enough to
consider.  Unless you got a bad weld or thin spot or void in the rod - then
it'll heat up like for thawing pipes.

Ralph
----- Original Message -----
From: "Woolley" <wjec at verizon.net>
To: <theforge at mailman.qth.net>
Sent: Thursday, August 25, 2005 10:22 AM
Subject: [TheForge] Grounding Points in Concrete Floors


Greetings,

I've seen some of the posts on new concrete floors being poured with
grounding points for welding etc.at various places.  I'm about to do the
same thing and was wondering what everyone used (must have missed this) as
their ground path underground.  I was going to use 1/2 rebar (I know rebar
is a # size, can't remember it) for my path, and basically bring it above
the concrete at various spots along the perimeter walls.  Is this
sufficient?  Will the heat conducted thru the path adversely effect the
concrete? Thanks.

Regards,
Bill Woolley
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