There is a possibility that the switch will be damaged. Mostly the light or fixture you are switching will not work.
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Light switch wired backwards. The only way to change the orientation of whether it is on or off is by physically reversing. A light switch only interrupts the hot side and the neutral wire bypasses the switch. The result is that the light will appear to work normally making the error hard to detect. In which case you will need to turn the power back off and unwire the switch and the other wire thats twisted together in the wire nut. With the switch mounted in the upright position. Moving the switch lever to the up position turns the lights off.
Moving the switch lever to the down position turns the lights on. But what that means is the light is always energized and only the return at the switch is toggled on or off. A light switch is a single pole switch. The switch and dimmer work fine but the operation of the switch is reversed. Then attach the black leg to the side of the switch labeled black or the side with the brass screw. You can reverse the wires and it will work exactly the same way.
And be sure to attach the green or bare wire to the green colored ground. If there is more than one set of wires that is when it can get tricky because the. Amateurs will sometimes reverse this. If one of the wires is still hot at the light fixture with the switch in the off position then you most likely have the light switch on the neutral wire. If you wire the switch backwards it will work backwards light switch on light off light switch off light on. The operation of the dimmer is correct in that position moving the dimmer slider up brightens the lights down dims the lights.
Be sure to attach the white leg to the side of the switch labeled white or the side with the silver screw.
Gallery of Light Switch Wired Backwards
