Is it normal to have 2 different size cables on your meter to isolation switch and then to consumer unit ?
See below View media item 83969 View media item 83970
See below View media item 83969 View media item 83970
Meter tails size
- Thread starter davebullocklive
- Start date
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It's normal for the pair of tails entering the meter to be a different size to the pair of tails leaving the meter - if that's what you mean.
16 mm was once the usual size for tails in houses, now 25 mm is more usual now.
Since no one else is allowed to touch the electricity company's tails entering the meter, this would explain why they are smaller.
I suspect the larger tails on the consumer's side of the meter are the result of some kind of upgrade or alteration.
16 mm was once the usual size for tails in houses, now 25 mm is more usual now.
Since no one else is allowed to touch the electricity company's tails entering the meter, this would explain why they are smaller.
I suspect the larger tails on the consumer's side of the meter are the result of some kind of upgrade or alteration.
As stated by Sparkwright.
You should note that the supply fuse is 60amps so the 16mm tails (the smaller ones ) are more than adequate.
You should, however, remember that you have a limitation on the maximum current. This is important if you were adding power-hungry devices like power showers, induction hobs, etc
But your ELECTRICIAN will take this into account when carrying out the DESIGN phase of any additions or alterations to your installation.
You should note that the supply fuse is 60amps so the 16mm tails (the smaller ones ) are more than adequate.
You should, however, remember that you have a limitation on the maximum current. This is important if you were adding power-hungry devices like power showers, induction hobs, etc
But your ELECTRICIAN will take this into account when carrying out the DESIGN phase of any additions or alterations to your installation.
So is the cable in isolation switch both sides 25 mm to consumer unit ?
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If your thinking of extending them to greater than 3m you need a switch fuse.
Another type of cable maybe more suitable
Another type of cable maybe more suitable
Almost certainly. Your electrician can check for you.
The electrician will be installing the new board 2.5 meters away from meter
So 25 mm double insulated cable should be fine ?
There is no electrician.
There is no new board, either. Its an old one that he is going to cobble together 
Are the cables 25mm
Do they size them by overall circumference for measuring ?
Do they size them by overall circumference for measuring ?
Probably, but your electrician can check.
No, they size them by cross sectional area or CSA.
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Lummy.
Thanks for help
Will you please, for the sake of your own safety and that of anybody else who enters the building, stop thinking that you have anywhere near enough competence to be doing this work AND GET AN ELECTRICIAN.
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