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Hi, here, Here goes with an explanation of how the switch is wired ; At the back of the plate behind the fuse ; On top is a the "L" from the supply Below this is the "N" from supply At the back of the plate behind the switch ; At the top is the "L" from the load/immers heater Below...

I haven't a clue either why the neon stays on even, it is only very dim but from your reply I'm guessing its just a case of swapping them over as the supply is in the load and load is in the supply. Many thanks.

Hi,thanks for speedy reply, Not sure when it was fitted as I've just bought the house & probably will never use the immersion heater in the later future. There are 4 terminals ( not including earth ) in the unit two are "L" and two are "N" but none indicate wether they are load or supply...

Hi, I'm new to this so please bear with me. In my airing cupboard is a switched 13a FCU with red neon. This is connected to a 3kw immersion heater. When the fcu is switched off The red neon glows ie is lit dimly but not at full brightness. When the fcu is switched on the neon lights up as...