Replace low voltage extractor

[MDHysteria]

The extractor fan is my wet room is very noisy and ineffective. I decided to replace it with something more modern and efficient. It's a fan that comes on with the light switch (outside the room) and turns off after a period of time (what feels like several hours in the middle of the night)

I assumed this would be a straightforward swap, so I purchased Xpelair DX100BTS as it matched the dimensions. I removed the existing fan and saw two wires, whereas the instructions require 3, labelled T N and L.

When rummaging around in the ceiling void, I discovered a giant 12V transformer in the ceiling void, which I was not expecting. I removed this, but I am now left with 4 wires.

The fan is above the shower, so I guess this is why a low voltage fan was selected. The new fan is IPX4 rated, which I understand is acceptable.

Having removed dozens of transformers that drove the multitude of downlights, from around the house (which failed often) I would rather remove this one from the equation too as it's just one more thing to go wrong. The transformer looks like it's been there for a long time.

Can somebody please advise how I should wire this up? Photo included.

thanks!

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[Rodders53]

Probably:

G/Y = earth
Brown (no sleeve) = Live
Grey (Blue sleeved) = Neutral
Black (Brown sleeved) = Switched Live

T (timer) = switched live and usually operates bathroom light, too via a switch/pullcord.

They'll say you should use a maintenance free junction box if the cable isn't long enough. Or something like https://www.toolstation.com/greenbrook-lighting-connector/p13165 might also suit?

You may need to use a meter to confirm that if you know how to do so safely.

 

[MDHysteria]

Thanks for your help @Rodders53. All sorted now. No earth required.