Copper Earth Rods

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Copper Earth Rods

Postby eyecatcher » Sun Aug 02, 2015 9:49 pm

Whats the criteria for deciding which copper earthing rod to plump for?

I was at one place yesterday and my choice was as follows;

10 foot 15mm (902bt)
8 foot 15mm (718bt)
10 foot 10mm (278bt)
8 foot 10mm (187bt)
6 foot 10mm (108bt)
3 foot 10mm (80bt)
I guess the above are copper plated steel?

then off the top of the scale were I assumed solid heavy copper and they were 2000-3500bt +

thanks
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Re: Copper Earth Rods

Postby pipoz » Sun Aug 02, 2015 10:00 pm

eyecatcher wrote:Whats the criteria for deciding which copper earthing rod to plump for?

I was at one place yesterday and my choice was as follows;

10 foot 15mm (902bt)
8 foot 15mm (718bt)
10 foot 10mm (278bt)
8 foot 10mm (187bt)
6 foot 10mm (108bt)
3 foot 10mm (80bt)
I guess the above are copper plated steel?

then off the top of the scale were I assumed solid heavy copper and they were 2000-3500bt +

thanks


Make sure it goes deep enough into damp soil

I used a 1.8m long solid heavy copper, cost around TB 2400

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Re: Copper Earth Rods

Postby canopy » Mon Aug 03, 2015 7:26 am

If the concrete hasn't been poured yet, consider a UFER ground which just uses the rebar you already have.
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Re: Copper Earth Rods

Postby BKKBILL » Mon Aug 03, 2015 2:19 pm

It's not who you know, it's whom you know.
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Re: Copper Earth Rods

Postby eyecatcher » Mon Aug 03, 2015 6:03 pm

I know hindsight is an exact science.
The UFER grounding costs nothing if you have the forethought to consider it; in my case despite the amateurish way my builder set up the ground beam cages sadly I was on hand to make sure they all had sufficient concrete cover..........and now its too late.

The daft thing is I have just been around my ground beam (hopefully) trying to find a bit of exposed rebar. :lol:

so gents back to my plan A; my original question which I thought was simple but obviously its not? whats the criteria for deciding on the size of a ground spike?
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Re: Copper Earth Rods

Postby Sometimewoodworker » Mon Aug 03, 2015 6:49 pm

eyecatcher wrote:I know hindsight is an exact science.
The UFER grounding costs nothing if you have the forethought to consider it; in my case despite the amateurish way my builder set up the ground beam cages sadly I was on hand to make sure they all had sufficient concrete cover..........and now its too late.

The daft thing is I have just been around my ground beam (hopefully) trying to find a bit of exposed rebar. :lol:

so gents back to my plan A; my original question which I thought was simple but obviously its not? whats the criteria for deciding on the size of a ground spike?


Don't forget that usually all the rebar is tied in together, so AFIK there is nothing wrong with setting the UFER grounding tie in to a column or roof steel beam.

image.jpg
UFER grounding
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Re: Copper Earth Rods

Postby Sometimewoodworker » Mon Aug 03, 2015 7:09 pm

My guess that the "place in the slab or foundation beam relates the the prevalence of wood framed houses, so since we build concrete frame houses, the top level bonding is perfectly OK.

Also on a completely different point if you have a metal roof there may be no need for a lightning protection system, as the whole structure is already grounded.
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