C 405.2.2 Time Switch Controls

Each area of the building that is not provided with occupant sensor controls shall be provided with time switch controls.

C 405.2 Solutions

  • Summary
  • With few exceptions all areas not covered by occupancy controls will include time based controls
  • Manual override required
  • 2 hour max override
  • Manual override cannot control more than 5000 square feet
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  • Crestron GLIPAC-SW8
  • The GL-IPAC-SW8 switching panel provides internal controls for 8 circuits of switched load and is expandable to support up to 64 circuits of switched load by adding external panels and switching modules
  • features local inputs for sensors and keypads, along with a LCD user interface where installers or users can set up the system without having to connect to a computer.
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C405.2 Lighting controls
Lighting systems shall be provided with controls as specified in Sections C405.2.1, C405.2.2,,
C405.2.3, C405.2.4 and C405.2.5
Exceptions: Lighting controls are not required for the following:
· Areas designated as security or emergency areas that are required to be continuously lighted.
· Interior exit stairways, interior exit ramps and exit passageways.
· Emergency egress lighting that is normally off.
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, Employee
lunch and break rooms, Private offices, Restrooms,
Storage rooms, Janitorial closets, Locker rooms, and other
spaces 300 square feet or less that are enclosed
by floor-to-ceiling height partitions, Warehouses.
Occupant sensor function
Occupant sensor controls shall comply with the following:
· Automatically turn off lights within 30 minutes of all occupants
leaving the space.
· Be manual on or controlled to automatically turn the lighting
on to not more than 50 percent power.
· Shall incorporate a manual control to allow occupants to turn lights off.
Occupant sensors in warehouses.
In warehouses, the lighting in aisle ways and open areas shall be controlled with
occupant sensors that automatically reduce lighting power by not less than 50 percent
when the areas are unoccupied. The occupant sensors shall control lighting
in each aisle way independently and shall not control lighting beyond the
aisle way being controlled by the sensor.
Time-switch controls
Each area of the building that is not provided with occupant
sensor controls shall be provided with time switch controls.
Light Reduction Controls
Spaces required to have light-reduction controls shall have a
manual control that allows the occupant to reduce the
connected lighting load in a reasonably uniform illumination
pattern by at least 50 percent.
Daylight-responsive controls
Daylight-responsive controls shall be provided to control the electric lights within
daylight zones in the following spaces:
• Spaces with a total of more than 150 watts of general lighting within sidelight daylight zones.
• Spaces with a total of more than 150 watts of general lighting within top light daylight zones.
Daylight controls function
controls shall be provided within each space for control of lights in that space and
shall comply with all of the following:
• Lights in top light daylight shall be controlled independently of lights in sidelight daylight
• Daylight responsive controls within each space shall be configured so that they can
be calibrated from within that space by authorized personnel.
• Calibration mechanisms shall be readily accessible.
• Where located in offices, classrooms, laboratories and library reading rooms, daylight
responsive controls shall dim lights continuously from full light output to 15 percent
of full light output or lower.
• Daylight responsive controls shall be capable of a complete shutoff of all controlled lights.
Exterior Controls
Lighting for exterior applications other than emergency lighting that is intended to be automatically
off during building operation, lighting specifically required to meet health and life safety requirements or
decorative gas lighting systems shall:
• Be provided with a control that automatically turns off the lighting as a function of available daylight.
• Where lighting the building façade or landscape, the lighting shall have controls that automatically
shut off the lighting as a function of dawn/dusk and a set opening and closing time.
• Where not covered above, the lighting shall have controls configured to automatically reduce the connected
lighting power by not less than 30 percent from not later than midnight to6 a.m.,from one hour after business
closing to one hour before business opening or during any period when activity has not been
detected for a time of longer than 15 minutes.
Additional Efficiency Requirements
Buildings shall comply with at least one of the following:
• More efficient HVAC performance.
• Reduced lighting power density
• Enhanced lighting controls
• On-site supply of renewable energy
• Provision of a dedicated outdoor air system for certain HVAC equipment
• High-efficiency service water heating

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