FCU to electric towel rail - aaargh!

No problems at all with fuses/breakers when you switch the towel rail on, just nothing happens except for live indication immediately disappearing from both live terminals in FCU. As soon as you turn FCU off, live returns to supply terminal - no other problems occur, no tripping, blowing etc.

This goes to proove that, like you have already been told, neon screwdrivers are about as much use as an ashtray on a motorbike.

Pop down to your local police station and deposit there. Most have a special bin for it.


Then, go out and buy a multimeter from your local DIY shed, and we might then stand half a chance of working out what is wrong with the circuit.
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Had a similar prob recently with a cooker supply, Check your neutrals, sounds like a duff contact somewhere. Use a decent multi-meter not a neon to check lives.
As wingcoax has just suggested you likely have a poor contact somewhere - high resistance - so as soon as the load is connected the 'phantom' voltage drops off.

Multi-meter really is your best bet for testing - not much hope otherwise! ;)

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