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| SECTION C405 ELECTRICAL POWER AND LIGHTING SYSTEMS |
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SECTION C405 ELECTRICAL POWER AND LIGHTING SYSTEMS
C405.2.1 Occupant sensor controls.
Occupant sensor controls shall be installed to control lights in the following space types:
- Classrooms/lecture/training rooms.
- Conference/meeting/multipurpose rooms.
- Copy/print rooms.
- Lounges/breakrooms.
- Enclosed offices.
- Open plan office areas.
- Restrooms.
- Storage rooms.
- Locker rooms.
- Corridors.
- Warehouse storage areas.
- Other spaces 300 square feet (28 m^2) or less that are enclosed by floor-to-ceiling height partitions.
Exception: Luminaires that are required to have specific application controls in accordance with Section C405.2.5.
C405.2.1.1 Occupant sensor control function.
Occupant sensor controls in warehouses shall comply with Section C405.2.1.2. Occupant sensor controls in open plan office areas shall comply with Section C405.2.1.3. Occupant sensor controls in corridors shall comply with Section C405.2.1.4. Occupant sensor controls for all other spaces specified in Section C405.2.1 shall comply with the following:
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They shall automatically turn off lights within 20 minutes after all occupants have left the space.
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They shall be manual on or controlled to automatically turn on the lighting to not more than 50-percent power.
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They shall incorporate a manual control to allow occupants to turn off lights.
Exception: Full automatic-on controls with no manual control shall be permitted in corridors, interior parking areas, stairways, restrooms, locker rooms, lobbies, library stacks and areas where manual operation would endanger occupant safety or security.
C405.2.1.2 Occupant sensor control function in warehouse storage areas.
Lighting in warehouse storage areas shall be controlled as follows:
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Lighting in each aisleway shall be controlled independently of lighting in all other aisleways and open areas.
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Occupant sensors shall automatically reduce lighting power within each controlled area to an unoccupied setpoint of not more than 50 percent of full power within 20 minutes after all occupants have left the controlled area.
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Lights that are not turned off by occupant sensors shall be turned off by time-switch control complying with Section C405.2.2.1.
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A manual control shall be provided to allow occupants to turn off lights in the space.
C405.2.1.3 Occupant sensor control function in open plan office areas.
Occupant sensor controls in open plan office spaces less than 300 square feet (28 m^2) in area shall comply with Section C405.2.1.1. Occupant sensor controls in all other open plan office spaces shall comply with all of the following:
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The controls shall be configured so that general lighting can be controlled separately in control zones with floor areas not greater than 600 square feet (55 m^2) within the open plan office space.
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General lighting in each control zone shall be permitted to automatically turn on upon occupancy within the control zone. General lighting in other unoccupied zones within the open plan office space shall be permit-ted to turn on to not more than 20 percent of full power or remain unaffected.
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The controls shall automatically turn off general lighting in all control zones within 20 minutes after all occupants have left the open plan office space.
Exception: Where general lighting is turned off by time-switch control complying with Section C405.2.2.1.
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General lighting in each control zone shall turn off or uniformly reduce lighting power to an unoccupied setpoint of not more than 20 percent of full power within 20 minutes after all occupants have left the control zone.
C405.2.1.4 Occupant sensor control function in corridors.
Occupant sensor controls in corridors shall uniformly reduce lighting power to an occupied setpoint not more than 50 percent of full power within 20 minutes after all occupants have left the space.
Exception: Corridors provided with less than two footcandles of illumination on the floor at the darkest point with all lights on.