2008 NEC and self-grounding

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  #1  
Old 03-18-09, 07:38 AM
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2008 NEC and self-grounding

I found a couple of threads that are 2007 and older, but I am looking for the definitive answer on 2008 NEC compliance of self-grounding and non-self-grounding devices in metal boxes.

That is, for compliance with the 2008 NEC, which of these three situations requires a grounding jumper, and which does not:

1. Self-grounding device, yoke IS in direct contact with metal box.
2. Self-grounding device, yoke IS NOT in direct contact with metal box.
3. Non-self-grounding device, yoke IS in direct contact with metal box.

Thanks.
 
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Old 03-18-09, 09:12 AM
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Assuming the metal box is grounded, a jumper is not required for #1, but is required for #2 and #3.
 
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Old 03-18-09, 03:39 PM
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Jumper is required for #3 only. #1 and #2 do not require a grounding pigtail.

More info see here ---> http://www.southwire.com/podcastArti...ng_Devices.flv

With #3 you would not need a pigtail if the device is a snap switch with metal screws attaching to a grounded metal box. 404.9(b)(1)
 

Last edited by Tolyn Ironhand; 03-18-09 at 04:44 PM. Reason: added "grounded"
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Old 03-18-09, 04:07 PM
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Whadaya know -- learn something new everyday.
 
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