A friend is building a new house in his garden. The garage is about 20
metres from the new house and there is a underground duct between
them. The local electricity board have terminated the supply with
their meter in the garage. The ccu will be in the house so does this
mean a hefty two core cable to take the supply from garage to ccu, I
say hefty as meter tails are 16mm these days I understand. His
existing house has overhead supply with TT earth, the new supply comes
from a pole over the road,underground to the garage so assume he will
also have a TT earth for the new house.Any suggestions about the
garage to house cable?