On a three-way switch, can it just be grounded in the box, or does it need to go to the box and then to the switch? Can it just go to the box? My house is wired just to the box, but I have been told it should also go to the switch.

Answer

Current electrical code requires that all switches be grounded. It is easy enough to add a short "pigtail" from the box to the switch, if the box is metal and already grounded.

Updated on April 9, 2018

Original Article:

How to Wire a 3-Way Switch: Wiring Diagram
By Dan Harmon

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