It does, especially when you flick the switch and plug your tester in and you don't hear snap crackle pop and get the results you want
I thought it would do but thought I'd look into the idea. I've told her that she really needs a new CU, which in turn will mean she needs a rewire (mainly because of the N+E fault and the IR between L+N was 8mohms. Must be puzzling for her though because the system has worked for 40 years. I've told her to go and get a second opinion if she needs but at least give me a chance to quote
. She has taken me up on the suggestion of recplacing the re-wirables with plugin mcb's.