Odd wiring.

The Medway Handyman · 2012-07-15T10:51:02+00:00

Doing various jobs at a lady's house, one of which was to replace the pull cord switch in her en suite. Like for like, should have been simple.Three story town house, en suite and common bathroom on the same floor.One extractor fan vents both bathrooms via trunking.The switch had failed mechanically as pull cords often do, but this one was a weirdo.Two cables coming in, both three core & earth, so red, yellow, blue.The switch (Tenby MG888) had 4 terminals + earth.Top left = COM, top right = N, bottom left = 1 WAY, bottom right = 2 WAY.Never seen one of these before.Cable 1 wired yellow to COM, red to 1 WAY, blue joined to blue in Cable 2.Cable 2 wired yellow to COM, red to 1 WAY, blue joined to blue from Cable 1.Terminals 1 WAY and 2 WAY are linked by a red cable.I assume it's wired so that the switch in either bathroom triggers the fan (which is on a timer).Three visits to electrical wholesalers & a web search doesn't find a Tenby MG 888 switch, so I've e mailed the manufacturers.Not knowing how the switch 'switches' I can't figure out how it would work or what alternative I can use if I can't locate a replacement switch.This has even caused the knowledgeable & helpful Mr Wadsworth to scratch his head!Any thoughts?

Odd wiring.

Jul 15, 2012 26 Replies

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The Medway Handyman 13 years ago

No Link?

YLW1?

YLW2?

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Andy Burns 13 years ago

Both reds (assume one is loop in, other is loop out to other switches and they were wired together before) to Supply1 (AKA SupplyL) with link to Supply2 (AKA SupplyN)

Yellows, can't remember your original wiring scheme but Load1 (AKA LoadL) to your light and Load2 (AKA LoadN) to you fan.

Blues wired together (if they were before)

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ARWadsworth 13 years ago

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Andy Wade 13 years ago

A cross-channel circuit...?

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Owain 13 years ago

We've got windmills.

They've got nuclear.

Owain

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The Medway Handyman 13 years ago

Went back today with a double pole switch, wired it in as advised - worked a treat - everything working as it should do.

Many thanks everyone, especially Adam & Owain.

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Owain 13 years ago

Has that poor woman been without a light / fan in her bog since 15 July???

Glad we got there in the end.

Owain

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