They are made by Click accessories, Clickmode modules which can be either purchased built-up as a complete unit, or you just buy the individual modules, 3 pole fan switch, fuseholder, front plate and rear gridplate and assemble yourself. They are great because it saves you having to chop 2 x backboxes into the wall.
I generally take the live feed for the whole bathroom through the fuse, that way all fan and light supplies/switch wires are protected by the fuse as per "manufacturers instructions"
The price for that item linked to is outrageous - the individual modules can be purchased for a pound or so each.
So that you may isolate the fan separately from the lighting. Oh, I nearly forgot: 'cos the manufacturer says so. I must say, though, that the fuse seems unnecessary.
3 pole switch required in order to isolate the fan/SELV transformer etc.
But if, as stated by perspicacious, the fuse covers both the permanent live and switched live then a three-pole switch is not necessary; a switched double-pole FCU would suffice.
3 pole switch required in order to isolate the fan/SELV transformer etc.
But if, as stated by perspicacious, the fuse covers both the permanent live and switched live then a three-pole switch is not necessary; a switched double-pole FCU would suffice.
The idea of the fan isolator was to keep the lights on when servicing the fan.
