Replacing an old dimmer switch and came across two red wires a blue and a white, not sure where to put the cables on the new single normal switch. Anyone know?
Red, white and blue are generally used when there is more than one switch on a circuit and, very simplistically, you need more than one phase wire running between the switches. If you aren't aware of this or the ramifications of it, I'd suggest you call a sparky.
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