Grounding metal box and light switch?

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  #1  
Old 01-10-07, 05:30 PM
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Grounding metal box and light switch?

I have a metal box with a switch. I connect the ground wire to the metal box with the blue/green screw. Do I also have to run the ground wire to the switch ground lug? Seems once I screw the switch to the metal box the switch will then be grounded.

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67lplc
 
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Old 01-10-07, 06:20 PM
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Unless the switch is a "self grounding" switch then you must pigtail a ground wire to it. Even if the switch is "self grounding" I still recommend the pigtail.
 
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Old 01-10-07, 06:31 PM
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racraft,
thanks for your reply, I guess I'm not sure how to tell if the switch is self-grounding and have never heard of this type. This is a standard 2-pole (SPST) light switch purchased at Lowes. How do you tell the difference?

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Old 01-10-07, 06:46 PM
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Look at the package it came in. If it didn't come in package (you shouldn't have bought it, but I digress), then it's not self grounding.
 
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Old 01-11-07, 03:52 AM
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I'm not sure what a switch not being in a package has to do with it. Very few residential devices come in individual packages any more. Even at supply houses.

If a switch is mounted to an effectively grounded metal box, it is considered grounded. There is no "self grounding" rule for switches as there is with receptacles.
NEC 404.9(B) is where this code is.
 
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