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PDFWAC 51-11C-405022

Section C405.2.2Time switch controls.

C405.2.2 Time switch controls. Each area of the building that is not provided with occupant sensor controls or digital timer switch controls complying with Section C405.2.1 shall be provided with time switch controls complying with Section C405.2.2.1.
Where a manual control provides light reduction in accordance with Section C405.2.3.1, time switch controls shall not be required for the following:
1. Spaces where patient care is directly provided.
2. Spaces where an automatic shutoff would endanger occupant safety or security.
3. Lighting intended for continuous operation.
4. Shop and laboratory classrooms.
C405.2.2.1 Time switch control function. Time switch controls shall comply with the following:
1. Have a minimum 7 day clock.
2. Be capable of being set for 7 different day types per week.
3. Incorporate an automatic holiday "shut-off" feature, which turns off all controlled lighting loads for at least 24 hours and then resumes normally scheduled operations.
4. Have program back-up capabilities, which prevent the loss of program and time settings for at least 10 hours, if power is interrupted.
5. Include an override switching device that complies with the following:
5.1. The override switch shall be a manual control.
5.2. The override switch, when initiated, shall permit the controlled lighting to remain on for not more than 2 hours.
5.3. Any individual override switch shall control the lighting for an area not larger than 5,000 square feet (465 m2).
6. Time switch controls are allowed to automatically turn on lighting to full power in corridors, lobbies, restrooms, storage rooms less than 50 square feet, and medical areas of health care facilities. In all other spaces, time switch controls are allowed to automatically turn on the lighting to not more than 50 percent power.
1. Within mall concourses, auditoriums, sales areas, manufacturing facilities and sports arenas:
1.1. The time limit shall be permitted to be greater than 2 hours provided the switch is a captive key device.
1.2. The area controlled by the override switch shall not be limited to 5,000 square feet (465 m2), provided that such area is less than 20,000 square feet (1860 m2).
[Statutory Authority: RCW 19.27A.020, 19.27A.025, 19.27A.160 and chapter 19.27 RCW. WSR 19-24-040, § 51-11C-405022, filed 11/26/19, effective 7/1/20. Statutory Authority: RCW 19.27A.025, 19.27A.160, and 19.27.074. WSR 16-03-072, § 51-11C-405022, filed 1/19/16, effective 7/1/16. Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-405022, filed 2/1/13, effective 7/1/13.]
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