I need to replace my meter tails!
(See my previous post "Playing with meter tails" if you are wondering why!)
My question is, what size do I need for 100A?
The sizes available from cpc.co.uk are..
Size/mm Stranding No./mm Nom. OD/mm
1.00 1/1.13 4.1
1.50 1/1.38 4.5
2.50 1/1.78 5.1
6.00 7/1.04 6.7
10.0 7/1.35 8.0
16.0 7/1.70 9.1
25.0 7/2.14 11.2
35.0 19/1.53 12.4
I seem to recall seeing someone talking about 25mm!
Thanks! - I will order some 25MM then!
I just spoke to Seeboard, to ask them about me pulling my fuse, and they
told me I need to call someone called PowerConnect on 01622 352 128
Seems the shut at 17:00 - so I will call them in the morning!
Just in case anyone was interested!
Well I called them, and then got transfer to "Network Services East"
Spoke to someone and explained I would like to pull the main fuse, do some
work on my CU replace the fuse, and then have someone come and replace the
The woman I spoke to then transferred me to someone else (with a clue!) and
after explaining it all again, steered me in the direction of just doing it
(but it didn't come from him!)
Wow. That's the first time I've heard that they would bother with this.
Probably because you asked for it in writing and they don't want a paper
trail leading to them telling you to do it on the sly.
I just did a new build and when I went back to connect up to the incoming
supply (when it finally arrived) there were stickers stating 25mm cable is
needed on the meter.
So what about your earth? You will need 16mm.
On Wed, 1 Oct 2003 08:56:46 UTC, "Christian McArdle"
Thanks...in fact they did that a while ago and I completely overhauled
the E-P bonding then....not to mention bonding the water and gas for the
(the house is double fronted; gas one side at the front, electricity
comes in other side at front; water at centre rear!) I can see why they
avoided doing it....
I had a couple of electricians quote me for replacing the fuseboards with a
consumer unit, one said the earth wire would have to be upgraded with
10mm, the other 16mm, I didn't pursue it at the time but now I'm left
wondering whether one was going to leave the existing 60A tails alone
whilst the other was going to upgrade them to 25mm. However, I did
think that the main earth bond had to be 16mm, and at least 10mm to
the water and gas pipes. Am I correct in this assumption?
As a side track to the thread, what about older installations with
<100A supplies / Meters?
I've just checked the OSG, and as expected there's a blanket 25mm^2
requirement. Can't find any reference to meter tails in the full regs
(only a brief look), though "adequately rated" is no doubt the
Anyway, to the point. I'll be fitting a new CU soon, and the tails at
the moment are 10mm^2 on a 40A meter. If I just re-use these (saves
breaking the meter seal), would I be complying with the 16th Ed?
After all, 10mm^2 is adequate for the 40A supply. Or is there some
overriding clause I've missed that states 25mm^2 minumum?
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