695.3 Power Source(s) for Electric Motor-Driven Fire Pumps
Informational Note: See Sections 9.3.2 and A.9.3.2 from NFPA 20-2019, Standard for the Installation of Stationary Pumps for Fire Protection, for guidance on the determination of power source reliability.
Exception to 695.3(B)(1) and (B)(2): An alternate source of power shall not be required where a back-up engine-driven fire pump, back-up steam turbine-driven fire pump, or back-up electric motor-driven fire pump with an independent power source in accordance with 695.3(A) or (C) is installed.
Selective coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, maintain, and operate the system.
Automatic shedding of one or more optional standby loads in order to comply with this capacity requirement shall be permitted.
Multiple power sources shall be arranged so that a fire at one source does not cause an interruption at the other source.