in Britain I'm utterly certain anyone connected with electricity ( or gas etc. ) supply, governmental or utility, retains a complete right to enter your properties, examine/remove/alter your meters, and do anything necessary: all without warrants.
Only in an emergency, otherwise they need consent or a warrant:
Rights of Entry (Gas and Electricity Boards) Act 1954
1 Restriction on exercise of rights of entry.
(1) No right of entry to which this Act applies shall be exercisable in respect of any premises except—
(a) with consent given by or on behalf of the occupier of the premises, or
(b) under the authority of a warrant granted under the next following section:
.
Provided that this subsection shall not apply where entry is required in a case of emergency.