The exception to 404.9(B) allows for a switch to be ungrounded if it is "provided with a faceplate of nonconducting,noncombustible material. Question is " Shouldn't this requirement also require the same for the faceplate screws" ? Although I see this alot in existing residential installations,very seldom do I see anything other than metal screws.
Many years ago when I was contracting; we always grounded the switches. I feel it makes for a safer job. How many times have you installed a plactic plate and found the home owner changed the plate before final inspection. Now working as an inspector, I have to follow the NEC. I would like to see switched grounded, I know plates are changed and home owners will put on any thing they think looks nice.
I seem to remember that in a "multi family housing STATE code, you needed non-conductive (nylon) screws) on switchplates. It may have also applied to hotels/motels. There was a thread relating to this a while ago, and I suggested that McMaster Carr still had nylon 6-32 screws in the catalog. John
