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250.146 Connecting Receptacle Grounding Terminal To Box #95817
10/08/05 12:28 PM
10/08/05 12:28 PM
ShockMe77  Offline OP
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
Hi, I was just curious as to why this code pertains to receptacles and not to switches. Or does it and I just haven't found it? I believe a ground fault could occur to a 4x4 switch cover plate just as easily as it could to a receptacle cover.


2017 / 2014 NEC & Related Books and Study Guides
Re: 250.146 Connecting Receptacle Grounding Terminal To Box #95818
10/08/05 12:36 PM
10/08/05 12:36 PM
iwire  Offline
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
404.9 Provisions for General-Use Snap Switches.

(B) Grounding. Snap switches, including dimmer and similar control switches, shall be effectively grounded and shall provide a means to ground metal faceplates, whether or not a metal faceplate is installed. Snap switches shall be considered effectively grounded if either of the following conditions is met.

(1)The switch is mounted with metal screws to a metal box or to a nonmetallic box with integral means for grounding devices.

(2)An equipment grounding conductor or equipment bonding jumper is connected to an equipment grounding termination of the snap switch.

Exception to (B): Where no grounding means exists within the snap-switch enclosure or where the wiring method does not include or provide an equipment ground, a snap switch without a grounding connection shall be permitted for replacement purposes only. A snap switch wired under the provisions of this exception and located within reach of earth, grade conducting floors, or other conducting surfaces shall be provided with a faceplate of nonconducting, noncombustible material.

[This message has been edited by iwire (edited 10-08-2005).]

Bob Badger
Construction & Maintenance Electrician


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