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Illustrated Changes to the NEC, 2005 Edition - Part 2

Article 695

Fire Pumps

695.4 Continuity of Power

New sentence clarifies that the a€ścarry the locked rotor current indefinitelya€ť requirement only applies to sizing the fire pump circuit protective devices, not the circuit conductors to the fire pump motor.

(B) Supervised Connection.
(1) Overcurrent Device Selection. The overcurrent protective device(s) must be selected or set to carry indefinitely the sum of the locked-rotor current of the fire pump motor(s) 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 requirement to carry the locked-rotor currents indefinitely does not apply to fire pump motor conductors.

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