WHEN? Requirement for Grounding Switches?

[hrlyman]

I realize the requirement of grounding switches using the green ground terminal on all metal yoke switches came about many years ago, but I am trying to document the actual years at which the following occurred:

1) When either the NEC or NEMA decided it was time to add the ground tab?

2) What code year did the NEC actually document "grounding of switches"?

3) What code year did enforcement begin?

I believe it occurred sometime between 1990 and 1996 (Code year '90,'93,'96)

If anybody has some knowledge of this and can help out it would sure be appreciated... mine eyes are tired of looking!


Thanks again

 

[Buck Parrish]

I think the nec picked it up in 93.
But different areas may not have adopted the nec.

 

[infinity]

I realize the requirement of grounding switches using the green ground terminal on all metal yoke switches came about many years ago, but I am trying to document the actual years at which the following occurred:

Actually are not always required to use the green grounding screw on the side of a switch. When mounted to a grounded metal box the two 6-32 screws are permitted to ground the switch.

 

[e57]

Actually are not always required to use the green grounding screw on the side of a switch. When mounted to a grounded metal box the two 6-32 screws are permitted to ground the switch.

Doesn't that just add to the confusion...... I try not to explain this to apprentices until they are ready - as it would not be long before the ground wire insn't connected to anything - EVER....

 

[infinity]

Doesn't that just add to the confusion...... I try not to explain this to apprentices until they are ready - as it would not be long before the ground wire insn't connected to anything - EVER....

I'm not sure I understand your point. He made a incorrect statement and I provided a correction, how is that confusing?

 

[hrlyman]

thanks for the correction but it doesn't answer my question of when?