I'm seeking advice on the necessary sign-off procedures for replacing a voltage optimization unit.
The specific work involves removing an existing unit and installing a new one. All cabling will remain in place, but it will need to be re-terminated to connect to the new unit.
The voltage optimization unit is located between the main incoming supply and the low-voltage distribution board.
Is it mandatory to have the work signed off by a registered electrician from a recognized body like NICEIC or ECA, even though it's a like-for-like replacement?
All engineers doing the replacement are 18th Edition Qualified.