Wiring for new extractor fan
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Radge70
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Wiring for new extractor fan

by Radge70 » Thu Nov 17, 2022 8:21 pm

I have a new extractor fan with terminal names 1(LT) 2(L) and 3(N).

The existing fan is currently wired with two separate grey cables (each of them have blue and brown cables inside). Twin and earth without the earth I think!

With the first grey cable the blue is going to "1 N Neutral Supply" and the brown is going to "2 S Switched Supply".

With the second grey cable the brown cable is going to "3 P Permanent Supply" (the blue cable is not connected to anything).

I have attached photos below and I am wondering where the existing cables should go in the new fan.
Attachments
New Terminals close up
New Terminals close up
New Fan
New Fan
Old Fan
Old Fan

Mr White
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Re: Wiring for new extractor fan

by Mr White » Thu Nov 17, 2022 9:11 pm

They should be connected the same way that they are now.

Radge70
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Re: Wiring for new extractor fan

by Radge70 » Fri Nov 18, 2022 12:47 pm

Thanks for the reply Mr White. To simplify things a bit, what I’m struggling with is how the terminals marked 1(LT) 2(L) and 3(N) on the new unit correspond to the terminals marked "1 N Neutral Supply", "2 S Switched Supply" and "3 P Permanent Supply" on the old unit. E.g. presumably 3(N) = "1 N Neutral Supply"

Mr White
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Re: Wiring for new extractor fan

by Mr White » Fri Nov 18, 2022 10:08 pm

If I give you a fish you will be fed for a day, but if I teach you to fish, you can feed yourself, likewise If I tell you the exact answer you will learn.............nothing.

If you have something you do not know, then do the parts you do know.

Your fan requires Live, Neutral and Switched live.
You already know what one of them is, when you figure the others out, you will kick yourself as it is so obvious.

Radge70
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Re: Wiring for new extractor fan

by Radge70 » Fri Nov 18, 2022 10:48 pm

3(N) = "1 N Neutral Supply" is only my bite?,
But 1(LT) = "2 S Switched Supply" could be right?,
meaning 2 (L) is Permanent Supply,
but I don’t know why,
so that’s the last time I ask Mr White
(plenty more fish in the sea!!!)

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