We have a 3 ph utility service (480/277 grounded) supplying a service switchboard, with a segregated vertical section which has a tap for service conductors (upstream of service disconnection) to supply a firewater pump controller. From the utility to switchboard we are bringing our grounded conductor and bonding within the switchboard.
For the conductors that go over to the fire pump controller, I understand these are still considered service conductors, and sized per 695.6 and 695.7. Is it correct that we need to bring the grounded conductor from the switchboard to the fire pump controller, and that this is considered 'grounded service conductor', sized per 250.24(C) and 250.102(C)(1)? Then, we re-bond the conductor at the fire pump controller as well?
I'm reverifying that my grounded conductor hasn't turned into an EGC due to its connection in the switchboard, but I'm thinking what I've described above is correct.
For the conductors that go over to the fire pump controller, I understand these are still considered service conductors, and sized per 695.6 and 695.7. Is it correct that we need to bring the grounded conductor from the switchboard to the fire pump controller, and that this is considered 'grounded service conductor', sized per 250.24(C) and 250.102(C)(1)? Then, we re-bond the conductor at the fire pump controller as well?
I'm reverifying that my grounded conductor hasn't turned into an EGC due to its connection in the switchboard, but I'm thinking what I've described above is correct.
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