Page 191 - Solar Power in Building Design The Engineer's Complete Design Resource

INDOOR LIGHTING COMPLIANCE 161

Figure 6.11 Residential energy use distribution.
Chart courtesy of CEC.
LIGHTING EQUIPMENT CERTIFICATION

The mandatory requirements for lighting control devices include minimum specifica-
tions for features such as automatic time control switches, occupancy-sensing devices,
automatic daylighting controls, and indoor photosensor devices. The majority of the
requirements are currently part of standard design practice in California and are
required for electrical plan checking and permitting.
Without exception all lighting control devices required by mandatory measures
must be certified by the manufacturer before they can be installed in a building. The
manufacturer must also certify the devices to the CEC. Upon certification, the device
is listed in the Directory of Automatic Lighting Control Devices.

Automatic time switches Automatic time switches, sometimes called time
clocks, are programmable switches that are used to automatically shut off the lights
according to preestablished schedules depending on the hours of operation of the
building. The devices must be capable of storing weekday and weekend programs. In
order to avoid the loss of programmed schedules, timers are required to incorporate
backup power provision for at least 10 hours during power loss.

Occupancy-sensing devices Occupancy-sensing devices provide the capability to
automatically turn off all lights in an area for no more than 30 minutes after the area has
been vacated. Sensor devices that use ultrasonic sensing must meet certain minimum
health requirements and must have the built-in ability for sensitivity calibration to
prevent false signals that may cause power to turn on and off.