I recently purchased a mid 1960's end terraced house with a detached garage. I am planning a rewire and have already replaced the jumble of old cast iron fuse boxes with a new split load CU. During this work I identified wires running in conduit which to my suprise remained live even when the mains power to my property was switched off ? These wires were entering a 15amp 'Danfoss' metal box (perhaps an old style RCD) but there were no wires exiting this box. I have never had power to my garage and wonder if this live wire was/is bringing power from somewhere else ?? to provide power to my garage.
I am in Scotland where the regulations applying in England and Wales regarding Electrical work are slightly different. Any ideas/tghoughts please.