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Meter Tails.

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You go to renew an old consumer unit. The Meter is in an outside wall box and the 16.0mm2 tails run in the cavity to a Henley block in the house nearby, where the consumer unit is located at high level. It is impossible to easily install new 25mm2 tails. There is no sign of overheating or damage at all. Do you just run your new 25mm2 tails from your new consumer unit to the Henley block or what? The main fuse must be a 100 Amp fuse as the house has storage heating, also supplied via 16.0mms tails which are in good condition.


Z.
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    I really don't see why you are worrying Zoom, at 100A the tails on a hot day might reach 80C after a few hours, but then you wouldn't be using the heating. On a cold day, it is very unlikely they will reach anything like 70C. You have evidence that the tails are in good condition, and the install is as before. Is it less safe than previously, no? Flint walls need the chasing machine zoom, and quite possibly a set of new diamond disks as well. Don't go there! I suppose you could fit a new external 25mm SWA for strict adherence to the regs, but I would watch out for the customer, she wouldn't like the snake up the wall and has a handbag with a brick in it ready to go!
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    I really don't see why you are worrying Zoom, at 100A the tails on a hot day might reach 80C after a few hours, but then you wouldn't be using the heating. On a cold day, it is very unlikely they will reach anything like 70C. You have evidence that the tails are in good condition, and the install is as before. Is it less safe than previously, no? Flint walls need the chasing machine zoom, and quite possibly a set of new diamond disks as well. Don't go there! I suppose you could fit a new external 25mm SWA for strict adherence to the regs, but I would watch out for the customer, she wouldn't like the snake up the wall and has a handbag with a brick in it ready to go!
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