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American light fittings, working in a UK house Answered

Im fitting 2 external light fittings purchased in the US in a UK house. The fitting have an inbuilt PIR sensor.
 Most fittings of this type here are designed to be wired straight into mains voltage but given this has a built in PIR sensor could that cause problems on the fitting working in the UK? US mains voltage is 110-120v @60Hz UK is 240v @ 50Hz

Im trying to find the best option to ensure they work so would 2 such fittings still work on UK current if wired in series with a 150w DC output transformer when they run 2 60w bulbs or Is there some other solution I am not thinking of ?

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steveastrouk
steveastrouk

4 years ago

Yes, you will have problems.

I'd run them on a 110V autotransformer, and put LEDs instead of incandescents, so you can use a smaller transformer. Maplin sell something suitable.

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Bob909
Bob909

Answer 4 years ago

Thanks for the helpful response. I had considered a step-down transformer but autotransformers & step-down transformers in general tend to be quite bulky, and impractical for the location. Its also difficult to get a bare wire one.
Is there a particular advantage to them or would a DC output Transformer, such as the ones used for halogen lights, do the trick? particularly given the electronic components are likely DC anyway.

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steveastrouk
steveastrouk

Answer 4 years ago

An autotransformer can be made from any split primary transformer of equivalent rating - insulate the secindary, connect 240 v to one end of the primary, and take 110 volts off the split and the other end of the primary common to the 240V