Two ground wires under one ground screw in a light switch box (ontario Leviton 1203-plc 15 amp, 120 volt, toggle pilot light, neutral 3-way ac Do you really need a ground wire in a light switch?
Grounded Light Switches: How to Test if Your Light Switches Are
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Grounded light switches test if
Grounded switch switchesDo light switches need to be grounded? how? Leviton® 15 amp grounding rocker light switchGrounded light switches: how to test if your light switches are.