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Gabriel asked Why some light switches do not have a ground wire?
At home I am trying to change or update the light switches and up to now, none of them have a ground wire, they have only 2 wires, in some they're both black, in some in black one white, and just 2 screws/holes on the switch? is this normal or should I worry about it? THANK YOU!
And got the following answer:
Light switches didn't used to be grounded until around 1987 or so. Even now, most inspectors don't require a ground wire for a snap switch. #1 Switch with 2 screws-simple snap switch. Romex application may have one cable coming into box with 2 wires in cable. This is permittable to use White wire as hot line, black should be return, switched. #2 Switch with 3 screws,( not counting the green grounding screw), 3way switch. Switches from more than one location. Be sure to remember which wire is on common, ( this is usually the odd color screw). Replacing outlets and switches is easier than it sounds. Use common sense and be careful.