Had the same the other day. Did a PIR on a house and got a dead short on the boiler radial when the boiler was isolated. When i looked into it i found it to be connected the same as your pic, live and load in same terminals. Bloody plumber...
I genuinely find it as hard, possibly harder, to understand how the minds of people like that work than I do the minds of people like Brady & Hindley. They are just sick, but 2 cables, and 2 sets of terminals, and "oh I'll put both cables in one set"....
It's a miracle that anyone that incapable of any intelligent behaviour could even stay alive without 24x7 care in an institution....
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