"Dave Plowman" wrote
| > Double pole is compulsory for certain applications - bathroom
| > cutoffs, hot water tank heaters, central heating controls
| > (I believe - can't see why) and a few others.
| Those, surely, are hard wired so you're talking about an isolator
| switch. With something that's plugged in you isolate it by
| unplugging it.
The objection to a SP-switched socket in these circs is that someone
switches off at the socket without unplugging, thinks it's isolated, then
Bang! Ouch! Yarrooo! finds it isn't.
But I agree they should all be hardwired.