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Hello All, We are just about to start renovation work including an extension on a 500 Year old house, and I think the electrics must have been installed when it was first built they're that bad! At the moment there is a new(ish) 100A Feed (Installed bout 6 years ago) marked "PME System". The...

Hello, Quick Question, wel quite long actually I have 2 quite large UPS's at my office, each connected to one 240v 13A double socket on a ring main protected by a 32A MCB. These are the only two devices on the ring main. There is then an RCD that protectes all of the MCB's in the...