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.
