250.148

tdg

Member
Location
Minnesota
I have a question about bonding the equipment grounding conductors. I have 2 12-2 NM and 3 14-2 NM in a duplex non metalic box. Am I allowed to bond all EGC's or do I have to seperate the 12's from the 14's?
 

Smart $

Esteemed Member
Location
Ohio
I have a question about bonding the equipment grounding conductors. I have 2 12-2 NM and 3 14-2 NM in a duplex non metalic box. Am I allowed to bond all EGC's or do I have to seperate the 12's from the 14's?
Only isolated ground conductors are permitted to be excluded from bonding all EGC's together in a box.
 

Dennis Alwon

Moderator
Staff member
Location
Chapel Hill, NC
Occupation
Electrical Contractor
I have a question about bonding the equipment grounding conductors. I have 2 12-2 NM and 3 14-2 NM in a duplex non metalic box. Am I allowed to bond all EGC's or do I have to seperate the 12's from the 14's?

I agree with Smart-- all the equipment grounding conductor's need to be connected together
 

tdg

Member
Location
Minnesota
I have a question about bonding the equipment grounding conductors. I have 2 12-2 NM and 3 14-2 NM in a duplex non metalic box. Am I allowed to bond all EGC's or do I have to seperate the 12's from the 14's?
Thank you guys. Another electrician and I were having this conversation.
 

tsamples

Member
Location
Oregon
Bond them all

Bond them all

This was common in my jurisdiction before I got here. The first time I called it the electrician told me, "You can't bond 12 and 14 together. That creates a separate path to ground." My response was, "Show me where the code tells you not to bond them together." They've been bonded ever since.
 
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