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Electrical

Wiring confusion for new 100mm bathroom fan

Anonymous user 09/03/2024 - 2.58 PM

So I thought replacing my 100mm extractor fan should be a simple DIY task, however never been so confused! So I have a worn out timed fan, it comes on with the pull cord switch, and turns off after a while due to the timer setting. It uses a 3 wire system (neutral, live and switched live). The cable coming into the unit from the supply has blue(connected to neutral on the fan unit) GREY with a brown sleeve on the end (this was connected to switch live) and then a Brown cable (live connection). So my new fan, only has TWO connections (live and Neutral). So I need neutral and one of those live (assumption being I want this fan to turn on and off with the switch so I connect the switches live?) My real question is how do I manage the left over (exposed) live in a safe way? Or is that completely unsafe to not have it connected to something properly? I’m by no means an electrician (as you probably guessed by this daft question) Any advice greatly appreciated

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3 Answers

C Herbert Electrics

Rating: 5 out of 5

Hackney Wick, London

Your real problem is that you have the wrong fan. It only has 2 wires because it does not have a timer, so you'll never get it to work as you wish. Terminate the brown wire in a joining block and connect the other 2 live and neutral, then the fan will operate with the light. I have come across some fans that don't work without all 3 wires connected, the only option is to change it.

Answered2 September 2018

Anonymous user

You can terminate the permanent live wire in a connector/strip block. Or if you have a 3 pole switch for the extractor fan you can disconect the permanent live from there as well and terminate it in a connector block.

Answered2 September 2018

DEACON ELECTRICAL SERVICES

Rating: 5 out of 5

Grimsby

You could put a occupancy detector in. This would operate as the timer and you could keep your existing fan.

Answered2 September 2018