I realise that's what usually happens - which is why, as I said, my advice would be the same as TTCs (i.e. to leave it alone).RCD protection on off peak boards always get omitted during consumer unit changes.
I largely agree, although 'off-peak' supplies obviously sometimes have periods of being live during daylight hours as well. As above, I would be happy to advise someone to leave it without RCD protection. My only point was that, whatever you, I or anyone else may think, if 'bringing up to current regs' would require RCD protection then some (presumably 'clever') people must feel that it is worthwhile. They presumably don't include requirements just for the hell of it.But to bring it up to date, if you want it to current standards, you would provide RCD protection for the off peak. Not that anyone would usually be drilling holes at night, but it would need doing on new work, if the cables were buried in the wall at less than 50 mm.
The same would probably be true of me. As I wrote recently in this thread, there is a theoretical (although probably very weak) argument for RCD-protecting anything and everything (which is, of course, where the regs are fairly rapidly heading).Though pointless, I would be tempted to fit a new off peak board with an RCD main incomer (but only in my house, if it was anyone else's money I would suggest because it is 'existing' to leave it alone unless they want to spend money).
Kind Regards, John