Branch circuit feeding building

[hhsting]

See attached sketch. I have bldgs N, B,C. All three buildings are storages warehouse with Bldg B and C smaller in size then Bldg N. Main service disco is at exterior wall of BLDG N. Service disco feeds Panel N inside building N. Panel N feeds thru feeder breaker to Panel C. Panel C has two branch circuits feeding another bldg 50 feet to Bldg B.

panel C is located attached to exterior wall of bldg C. It feeds Bldg C branch circuit lights as well as Bldg B branch circuit lights.

Questions:

1. Would Bldg B need main disco since it has multiple branch ckts? I am aware of 225 but I am not sure it’s confusing since Panel C from which two branch circuits originate is located on exterior walls of Bldg C.

2. Panel C is MLO. Would Panel C not need main breaker? Again it’s confusing it’s on exterior wall attached to Bldg C.

3. Would Panel C need grounding electrode system? Yes I am aware of 250.32 but it’s on exterior wall of Bldg C. So not sure.

All references NEC 2014 please

Thanks for your input

 

[jusme123]

Read 250.32

 

[Dennis Alwon]

Very hard to follow but you cannot have 2 branch circuits feeding a building unless you meet the exception in section stated above.

If one of those circuits feed the panel in C then it is a feeder so please clarify

 

[hhsting]

Very hard to follow but you cannot have 2 branch circuits feeding a building unless you meet the exception in section stated above.

If one of those circuits feed the panel in C then it is a feeder so please clarify

Panel C is fed from Panel N in different bldg. Panel C feds 2 branch cuts to bldg B and 2 branch cuts to Bldg C.


Panel C is on the exterior walls of Bldg C. Not sure if Bldg C would have to comply per 250.32 since Panel C is on exterior walls of bldg c is it considered feeder feeding building C, structure or it’s more like feeder feeding panel?


Sent from my iPhone using Tapatalk

 

[hhsting]

Panel C is fed from Panel N in different bldg. Panel C feds 2 branch cuts to bldg B and 2 branch cuts to Bldg C.


Panel C is on the exterior walls of Bldg C. Not sure if Bldg C would have to comply per 250.32 since Panel C is on exterior walls of bldg c is it considered feeder feeding building C, structure or it’s more like feeder feeding panel?


Sent from my iPhone using Tapatalk

No takers? No one knows?


Sent from my iPhone using Tapatalk

 

[kwired]

If your supply circuit lands in a panel and has additional overcurrent devices before supplying individual branch circuits, then that supply circuit is a feeder. See art 100 definitions.