19-08-2019, 11:08 AM
(17-08-2019, 10:35 AM)Terry Wrote: Hi, Amie, I must admit that when I last worked somewhere where we used isolating transformers, the RCBO hadn't been invented (as far as I know!)
I was wrong!
I mentioned this to my electrician who directed me to this patent application dating back to 1965.
No indication as to when they might have first appeared in the UK, though.






