Summer House / Office - MCB's and consumer unit help

lifetimesmile · 26 Nov 2007

Thanks comms can you advise on how to TT to the ground where could i buy the products to ground it?

Thanks

comms · 26 Nov 2007

ricicle · 26 Nov 2007

Blimey Comms, you been on the blue Smarties and Red Bull...

lifetimesmile · 26 Nov 2007

And of which i am extreamly thankful

just one more question to i think set me up and ready to go how deep should i put the earth rod in the ground?

Thanks again everyone for ur help.

comms · 26 Nov 2007

lifetimesmile said:
And of which i am extreamly thankful just one more question to i think set me up and ready to go how deep should i put the earth rod in the ground?

Thanks again everyone for ur help.

Well that depends on the Ze result when tested.......sometimes distance is better than depth

comms · 26 Nov 2007

ricicle said:
Blimey Comms, you been on the blue Smarties and Red Bull...

But hopefully nobody noticed the mistake before editing.
TT with no rcd oooooooooooooops

lifetimesmile · 26 Nov 2007

Just when you think your getting somewhere, so i really need to find someone to put in the earthing rod. or just put it into the ground till it hits australlia?

DESL · 26 Nov 2007

http://www.tlc-direct.co.uk/Main_Index/Earthing_Index/Earthing/index.html

Sorry smiler just realised comms beat me to it

BTW TLC isn't the cheapest wholesaler but they have the best on line catalogue.

lifetimesmile · 26 Nov 2007

is just one deep enough though?

comms · 26 Nov 2007

It depends on what the soil type is.
If it's not stoney / gravel / rock based you should be ok with one rod, but you wont know for definate unless its testedcorrectly.
But seen as the mainswitch is an rcd you (in theory) could have a max Ze of 1666 ohms but better to get it below 200 even better at 100 or less.

As said it's sometimes a better result if the rods are placed a distance apart rather than joined length wise.

Seen as nobody has mentioned it (i think)...you do know this work is notifiable under part P ?

comms · 26 Nov 2007

Thats it for me tonight I'm off to get me fat head down....
Night all.

DESL · 26 Nov 2007

Depends on how damp/wet subsoil is.

There are extension kits so you can join another rod on and go deeper.

Sometimes it's easier to put a couple of rods down and link them it all depends on terrain

lifetimesmile · 26 Nov 2007

yep i do know about part P. Am also looking to actually become a qualified electrician but already running an IT company its finding time to actually qualify. Thanks for all your help.

lifetimesmile · 26 Nov 2007

One registered part P electrician i got to quote has quoted on 6mm2 armour and mentions nothing about actually earthing it. i assume he was going to just earth it to the houses supply. and a second quote mentions 10mm2 and like wise no earthing rod's so this is what makes me think i'd be better off doing it myself and just getting it checked as it seams thier just out for money and not intrested in the best for future proofing

Sorry about my lil moan!

DESL · 26 Nov 2007

A lot depends on what you asked for in your spec and of course we don't know what your earthing arrangements are whereas the the visiting sparks should have inspected that on their visits.

For instance I have had a quote questioned recently for a similar job as yours (my quote was higher than another contractor) but when I explained my design criterion in terms of extending eaxpanding etc, to customer I got the job,

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Summer House / Office - MCB's and consumer unit help

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