3 Prong Switch With Light

3 Prong Switch With Light. The wire in the middle is always the neutral wire. Obviously two of them are just inline with the positive wire, and the third is either ground or positive for the light.

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Discover just what each part of a three prong outlet does and how they keep you safe. I have a lighted toggle switch that has three prongs on the back of it, but I am not sure what goes where. The wire in the middle is always the neutral wire.

Replacing a Toggle Light Switch With a Rocker Style Switch.

I just don't know which it is, and which prong is for what.

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Two-prong outlets have no ground wire, without which the risk of electrocution and appliance damage is substantial. You switch out your two-prong for a three-prong, but there's a lot to consider before you start rewiring your apartment. I left the grounding strap assembled and just doubled up the green and white wires on the middle terminal block position.