Hi all, just wondering where i stand here. Scenario is as follows PME supply, 60a service fuse, 16mm tails running into DP isolator in the meter box. Going to upgrade the CU,no problem with load etc so the 60a fuse is fine. Was going to run new 25mm tails into the Dp isolator. Do the tails from the other side of the isolator need to be upgraded too? Like i say, service fuse and load aren't changing, obviously the 16mm is fine, but wasnt sure if it would need to be changed from the meter to the isolator. Cant pull service fuse so if it needed done the energy supplier would have to do this and probably charge for it yes??