Fire Pump Secondary Feeder

[jimmyz710]

A fire pump is being provided with two feeds in a multi building campus-style complex with the fire pump located in one building. The primary feed to the fire pump controller (with auto transfer switch) is being provided underground to the controller. The secondary source of power is being provided from an adjacent building (which has separate switch gear) and the conductors are being routed through the basement (within the building) to the pump controller auto transfer switch. The fire pump is located in the basement of this building.

My question: Is the secondary source of power required to be encased in concrete and or run in Mineral insulated cable where it runs within the basement of the building? Article 695-6 (a) of the 1999 NEC indicates that these conductors should be encased in concrete, but there is an exception listed below it. Does this exception apply to both primary and secondary conductors, eliminatiing the need for encasement (and or a 1 hour rating) of the conductors upstream of the auto transfer switch?

 

[hbendillo]

Re: Fire Pump Secondary Feeder

You probably need to get some more information about your primary and secondary power sources. From where does your "Primary" source originate. Pad mounted transformer, Generator,...? Is the building from which the secondary power source originates connected to a separate utility service than that of your building with the fire pump?