403.4.8.3.1 Standby power loads in occupancies other than Group R-2.

In buildings of any occupancy group other than Group R-2, the following are classified as standby power loads:

   1.   Power and lighting for fire command center required by Section 403.4.6;

   2.   Ventilation and automatic fire detection equipment for smokeproof enclosures;

   3.   Elevators, in accordance with Section 3003; and

   4.   Stair pressurization systems when provided.

403.4.8.3.2 Standby power loads in Group R-2 occupancies.

Group R-2 occupancies in buildings greater than 125 feet (38 100 mm) in height shall be required to provide a standby power system to support the following loads:

   1.   Power and lighting for fire command center required by Section 403.4.6;

   2.   Ventilation and automatic fire detection equipment for smokeproof enclosures;

   3.   At least one elevator serving all floors, or one elevator per bank where different banks serve different portions of the building; and

   4.   Stair pressurization systems when provided.

403.4.8.4 Emergency power systems.

An emergency power system complying with Section 2702 shall be provided for emergency power loads specified in Sections 403.4.8.4.1 and 403.4.8.4.3. Fuel sources for generators shall be in accordance with Section 2702.1.1.

403.4.8.4.1 Emergency power loads in occupancies other than Group R-2.

In buildings of any occupancy group other than Group R-2, the following are classified as emergency power loads:

   1.   Exit signs and means of egress illumination required by Chapter 10;

   2.   Elevator car lighting;

   3.   Emergency voice/alarm communications systems, including Fire Department in-building Auxiliary Radio Communication systems (ARCs);

   4.   Automatic fire detection systems;

   5.   Fire alarm systems; and

   6.   Electrically powered fire pumps, including manual fire pumps, automatic fire pumps, and sprinkler booster pumps.

403.4.8.4.2 Emergency power loads in Group R-2 occupancies.

Group R-2 occupancies in buildings greater than 125 feet (38 100 mm) in height shall be required to provide an emergency power system to support the following loads:

   1.   Exit signs and means of egress illumination required by Chapter 10;

   2.   Emergency voice communications systems, including Fire Department in-building Auxiliary Radio Communication systems (ARCs); and

   3.   Electrically powered fire pumps, unless electrical power to the motor is taken ahead of the main from the street side of the house service switch.