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I'm not sure what you mean by saying make up your mind..... The switch gives off a blue spark, (this has only occurred after installing low voltage lighting - with no transformer) The switch was changed - not to any special brand but it is white plastic and not metal. I'm increasingly...

According to the Wickes instructions no transformer was required. The double switch should take up to 1000w and there is less than 850 in total. 450 on one switch and 400 on the other.

Can anyone help? I've recently installed low voltage lights and a new light switch. The low voltage lights did not need to be earthed, however I have now noticed that the light switch has a visible blue spark when you turn the switch on/off. An electrician recently replaced the switch and now...