Multiple grounds in a metal box

[RatherBeFishin]

Do I have article 250.148 understood right?

When multiple ckts are in a metal box all ckts egcs must be tied together and bonded to the metal box?

Whether it be by a ground bar in a larger box or pigtail in a smaller box

 

[infinity]

That's correct. You can use either a ground bar or the pigtail method.

 

[LarryFine]

You could attach each EGC individually to the box if you really wanted to.

 

[don_resqcapt19]

Do I have article 250.148 understood right?

When multiple ckts are in a metal box all ckts egcs must be tied together and bonded to the metal box?

Whether it be by a ground bar in a larger box or pigtail in a smaller box

Only the EGCs for circuits that are spliced or terminated within that box.

 

[RatherBeFishin]

Only the EGCs for circuits that are spliced or terminated within that box.

Right you’re saying if it’s just a pull box essentially otherwise splice boxes and boxes with devices with multiple ckts I’d say ground all go together and bonded to box if metal

 

[infinity]

Right you’re saying if it’s just a pull box essentially otherwise splice boxes and boxes with devices with multiple ckts I’d say ground all go together and bonded to box if metal

This code section does not compel you to cut the EGC's of feed through circuit conductors to splice the EGC's. If the circuit conductors within the box terminate on a device or are spliced then those EGC's are required to go together.

 

[RatherBeFishin]

You could attach each EGC individually to the box if you really wanted to.

Maybe if you ran out of spaces under a ground bar or blue gray but I was just confirming that the code section meant that all circuits grounding conductors were indeed meant to go together. I’ve seen some argue that you don’t want them together but they all end up together at the main panel so

 

[RatherBeFishin]

This code section does not compel you to cut the EGC's of feed through circuit conductors to splice the EGC's. If the circuit conductors within the box terminate on a device or are spliced then those EGC's are required to go together.

Ok just so I’m crystal clear @infinity , cause I’ve had the arguement with a guy once that said just splice the grounds together individually with independently. So if you have two ckts in a 1900 that are spliced together or 20 mc cables in a 12x12 splice box all of those grounds go together accordingly. I’ve always done that and to me it’s a good thing to have multiple paths back to ground. Thx!

 

[infinity]

Ok just so I’m crystal clear @infinity , cause I’ve had the arguement with a guy once that said just splice the grounds together individually with independently. So if you have two ckts in a 1900 that are spliced together or 20 mc cables in a 12x12 splice box all of those grounds go together accordingly. I’ve always done that and to me it’s a good thing to have multiple paths back to ground. Thx!

Yes.

 

[don_resqcapt19]

Ok just so I’m crystal clear @infinity , cause I’ve had the arguement with a guy once that said just splice the grounds together individually with independently. So if you have two ckts in a 1900 that are spliced together or 20 mc cables in a 12x12 splice box all of those grounds go together accordingly. I’ve always done that and to me it’s a good thing to have multiple paths back to ground. Thx!

They can be splice individually with a jumper to the enclosure from each splice, or they can be all spliced together with s single jumper of the largest size taken the the enclosure.
Often where there are a large number of EGCs in the enclosure a grounding bus bar will be installed in the enclosure.