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Steven Jackson 02-09-2009 07:07 PM

switch grounding
 
I know in certain situations receptacles dont have to grounded.

What about switches? Do they always have to grounded?

rgsgww 02-09-2009 07:26 PM

Quote:

Originally Posted by Steven Jackson (Post 227942)
I know in certain situations receptacles dont have to grounded.

What about switches? Do they always have to grounded?


If the box is metal and is grounded, the switch is flush with the box (washer removed), you don't need to ground the switch.

Speedy Petey 02-09-2009 08:05 PM

Receptacles must always be grounded. A "self-grounding" receptacle mounted to a grounded metal box does not need a jumper, nor does one mounted firm to a metallic box.
NEC 250.146(A)&(B)


ANY switch simply mounted to a grounded metallic box is grounded. Switches to not need to sit tight to a box nor do they need self-grounding clips.
The only time a switch does not need any grounding is a replacement switch in an ungrounded application.
NEC 404.9(B)

Steven Jackson 02-09-2009 08:28 PM

What about to a plaster ring to a box?

Termite 02-09-2009 08:51 PM

If the mudring is metal and it is attached to the grounded metal box, I'd say it is safe to assume that the mudring is effectively grounded. If the mudring is plastic then you'd need a jumper to the device.

Switches in plastic boxes must always be grounded.

Steven Jackson 02-09-2009 09:23 PM

Awesome thanks guys. :thumbsup:


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