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I have sockets around my sitting room that I can control and dim from the light switch. I want to plug in some christmas lights but don't want to change all the plugs. CAn i change the plug on a normal extension cable for a 5 amp small round pin plug and plug in some square pin lights to that, allowing me to dim from the light switch?

Michelle

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    What country are you in? It is illegal in the US and other NEC countries to place receptacles on a dimmer, unless they are specially keyed to only accept dimmable lamps. – Harper Dec 5 '17 at 18:29
  • I was thinking the same thing + – Ed Beal Dec 5 '17 at 20:12
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Assuming by this that you mean UK standard 13A 3-square pin plugs and 5A 3-round pin plugs then yes.

I have done this for my lights for several years.

You do have to bear one thing in mind. While 13A square-pin plugs contain a fuse within the plug, 5A round-pin plugs do not. They are protected by the circuit breaker at the main fuse box.

I assume your 13A plugs actually contain a 3A or 5A fuse if you're using them just for fairy lights. Check the ratings and where your round-pin sockets are actually protected.

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