chuck@apsinc.biz
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NEC 695.6(B) Circuit Conductors. Fire pump supply conductors on the load side of the final disconnecting means and overcurrent device(s) permitted by 695.4(B) shall be kept entirely independent of all other wiring. They shall only supply loads that are directly associated with the fire pump system, and they shall be protected to resist potential damage by fire, structural failure, or operational accident. They shall be permitted to be routed through a building(s) using one of the following methods:
(1) Be encased in a minimum 50 mm (2 in.) of concrete
(2) Be within an enclosed construction dedicated to the fire pump circuit(s) and having a minimum of a 1-hour fire resistive rating
(3) Be a listed electrical circuit protective system with a minimum 1-hour fire rating
Exception: The supply conductors located in the electrical equipment room where they originate and in the fire pump room shall not be required to have the minimum 1-hour fire separation or fire resistance rating, unless otherwise required by 700.9(D) of this Code.
The above code reference only addresses permissible methods for running fire pump circuit conductors THROUGH a building. If the fire pump circuit conductors are installed per NEC 230.6(4)
(4) Where installed in conduit and under not less than 450 mm (18 in.) of earth beneath a building or other structure
Is the requirement of NEC 695.6(B)"....they shall be protected to resist potential damage by fire, structural failure, or operational accident....." satisfied?
(1) Be encased in a minimum 50 mm (2 in.) of concrete
(2) Be within an enclosed construction dedicated to the fire pump circuit(s) and having a minimum of a 1-hour fire resistive rating
(3) Be a listed electrical circuit protective system with a minimum 1-hour fire rating
Exception: The supply conductors located in the electrical equipment room where they originate and in the fire pump room shall not be required to have the minimum 1-hour fire separation or fire resistance rating, unless otherwise required by 700.9(D) of this Code.
The above code reference only addresses permissible methods for running fire pump circuit conductors THROUGH a building. If the fire pump circuit conductors are installed per NEC 230.6(4)
(4) Where installed in conduit and under not less than 450 mm (18 in.) of earth beneath a building or other structure
Is the requirement of NEC 695.6(B)"....they shall be protected to resist potential damage by fire, structural failure, or operational accident....." satisfied?
