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i had exactly the same problem in the summer. Had to replace the whole unit after no joy walking round a few shops.

Ah. oops :oops:

At night, constant switching on and off perhps? As a slight side note, where I used to work we had a fluoro tube in the boiler room that was on constantly. In the 3 years I was there it never got changed.

This might be wrong but I was told rotary on/off was for a 1 way lighting system, and push on/off is for 1 or 2 way systems. I personally prefer push on/off as it seems a lot less effort!

Could it be related to this? http://www.lightyears.dk/ Is the box quite dense, or heavy? If so maybe a transformer? Are there any output terminals? Bit more info and a pic would help.

You really can't get something similar designed for the UK market?

I hope they like our products as much as we seem to be liking theirs lately.

In this instance it doesn't matter.

If you only have 2 wires put one into com, and the other into L1. (or L2 as its only a 1 way circuit.) edit: if new switch has metal face plate this MUST be earthed.

I agree its sensible, but its not factual. It could confuse someone who wants to get in the industry.

Where did you get this info from?

Put your light bulb back, then remove the other 2, but one at a time. What happens?

If you're in London, the Leyland SDM stores do an identical set for £17.

Keep your ordinary incandescent lamps with your ordinary dimmers. To replace them with extraordinary dimmable led's and their counterpart extraordinary dimmers would take decades to recoup your outlay. And you'll probably prefer the type of light output from your current setup.

As BAN says, its not neutral. All 3 are line and will carry 230 volts depending on the switch position(s). The black wire should have a bit of red tape round the end to signify this. The reason for this? Cable with 3 red cores and an earth is not readily available. Hope that helps.

Does this still apply to 'modern' high frequency control gear with an electronic ballast?

I'm guessing where you said 'blade' you mean black? If you got a shock off the metal body then black is a live conductor. A test meter is required to determine which is line, neutral and earth, which is all that the fitting requires. The fourth wire, which may be a permanent or switched line...

So, do Chinese businesses require different type of testing equipment?

?

Ah, ok! Thanks RF!