i am extending house which requires me to move service boxes to outside wall lece board are moving box but are only putting 1metre tails in. fuse box is 3 metres away
from new box question is i have been told i need to put a
isolating switch inbetween because of distance is this true
and what length can you buy tails in plus how much will a sparky charge for this job

just want the tails putting in from consumer to service box
i will be installin new fuse box

Many DNO's (lecky board) will allow any length tails now, but there are still a few that will only allow a spec distance.

BUT

This distance is usually 3m.  (many houses have a meter box outside, and the CU high up on the wall inside).  The tails from your CU to the meter are YOUR responsibility, if the isolator is theirs, the tails from the meter to the isolator are THEIRS, and the tails from the isolator to the CU are YOURS.

I suspect the 1m rule they have stipulated is the max distance they will run to the isolator(which is usually with in the meter box).

You should ask your DNO what their max length of tails is, and you could install these from your CU to their meter.

also need location for a price....you might even be in somones area

ss

I'm in Derbys, but Rotheram's a bit of a long run to do just to tighten up four big screws!

TT