keepitsimplestupid
Member
A question came up where one has a 3 switches, 3 NM-B cables and a 3 gang plastic box. So far, so good.
If this were a metal box, one would connect all the ground conductors to the ground terminal on the switch, then bond to the box.
Now, I interpret 250.148d...
To mean that it's permissable to connect the grounds from each NM-B cable to each switch without twisting them all together.
This, I believe, makes sense from an electronic standpoint.
Does this violate this rule
So the question is:
When wiring 3 switches and 3 NM-B switch loops in a non-metalic box, do the
1) NB-B grounds have to be connected together and to each switch?
-or-
2) Each would have an NM-B ground from the NM-B cable of the corresponding switch loop and no connection to each other within the box?
Aside: A metal cover plate would inadvertantly connect these together.
Any takers?
If this were a metal box, one would connect all the ground conductors to the ground terminal on the switch, then bond to the box.
Now, I interpret 250.148d...
2008 NEC said:(250.148d) Nonmetalic boxes: One or more equipment grounding conductors brought into a a nonmetalic box shall be arranged such that a connection CAN be made to any fitting or device in the box requiring grounding.
To mean that it's permissable to connect the grounds from each NM-B cable to each switch without twisting them all together.
This, I believe, makes sense from an electronic standpoint.
Does this violate this rule
NEC said:Continuity and Attachment of Equipment Grounding Conductors to Boxes.
Where circuit conductors are spliced within a box, or terminated on equipment within or supported by a box, any equipment grounding conductors(s) associated with those circuit conductors shall be connected within the box or to the box with devices suitable for the use in accordance with 250.148(A) thru (E).
So the question is:
When wiring 3 switches and 3 NM-B switch loops in a non-metalic box, do the
1) NB-B grounds have to be connected together and to each switch?
-or-
2) Each would have an NM-B ground from the NM-B cable of the corresponding switch loop and no connection to each other within the box?
Aside: A metal cover plate would inadvertantly connect these together.
Any takers?