695-Fire Pumps: Page 2 of 7

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such power sources in combination with an on-site standby generator complying with 695.3(B)(1) and (B)(3).

(1) Generator Capacity. An on-site generators) used to comply with this section shall be of sufficient capacity to allow normal starting and running of the motor(s) driving the fire pump(s) while supplying all other simultaneously operated load. Automatic shedding of one or more optional standby loads in order to comply with this capacity requirement shall be permitted. A tap ahead of the on-site generator disconnecting means shall not be required. The requirements of 430.113 shall not apply. [20:9.6.1]

(2) Feeder Sources. This section applies to multibuilding campus-style complexes with fire pumps at one or more buildings. Where sources in 695.3(A) are not practicable, and with the approval of the authority having jurisdiction, two or more feeder sources shall be permitted as one power source or as more than one power source where such feeders are connected to or derived from separate utility services. The connection(s), overcurrent protective device(s), and disconnecting means for such feeders shall meet the requirements of 695.4(B). [20:9.2.2(4)]

(3) Arrangement. The power sources shall be arranged so that a fire at one source will not cause an interruption at the other source.

695.4 Continuity of Power. Circuits that supply electric motor-driven fire pumps shall be supervised from inadvertent disconnection as covered in 695.4(A) or (B).

(A) Direct Connection. The supply conductors shall di rectly connect the power source to either a listed fire pump controller or listed combination fire pump controller and power transfer switch.

Where the power source is supplied by on-site generators), the supply conductors shall connect to a generator disconnecting means dedicated for the purposes of serving the fire pump. The disconnecting means shall be located in a separate enclosure from the other generator disconnecting means.

(B) Supervised Connection. A single disconnecting means and associated overcurrent protective device(s) shall be permitted to be installed between a remote power source and one of the following:

(1) A listed fire pump controller

(2) A listed fire pump power transfer switch

(3) A listed combination fire pump controller and power transfer switch

For systems installed under the provisions of
695.3(B)(2) only, such additional disconnecting means
and associated overcurrent protective device(s) shall be
permitted as required to comply with other provisions
of this Code. Overcurrent protective devices between
an on-site standby generator and a fire pump controller
shall be selected and sized according to 430.62 to
provide short-circuit protection only. All disconnecting
devices and over-current protective devices that are
unique to the fire pump loads shall comply with
695.4(B)(1) through (B)(5).

(1) Overcurrent Device Selection. The overcurrent pro- tective device(s) shall be selected or set to carry indefinitely the sum of the locked-rotor current of the fire pump motors) and the pressure maintenance pump motor(s) and the full-load current of the associated fire pump accessory equipment when connected to this power supply. The next standard overcurrent device shall be used in accordance with 240.6. The requirement to carry the locked-rotor currents indefinitely shall not apply to conductors or devices other than overcurrent devices in the