emergency lighting

The Auxiliary Transfer Switching Device and Control Relay Device work in conjunction with an emergency lighting inverter or auxiliary generator to power switched and dimmed emergency lighting loads.

  • Suitable for use with indoor-dry or damp location fixtures
  • Factory or field installation (ATSD)
  • Field installation (ATSD20/BCCR20)
  • Bypasses local switch (ATSD/ATSD20/BCCR20) or dimmer (ATSD20/BCCR20)

For use in indoor and damp locations to transfer a switched emergency lighting load to a designated emergency source.


Ambient Temp. Range
  • ATSD: (-4 °F to 149 °F) -20 °C to 65 °C
  • ATSD20/BCCR20: (-4 °F to 131 °F) -20 °C to 55 °C
  • Conditioned Space
  • Damp location
Environmental Conditions Damp Location
Finish TypeATSD: Galvanized Finish
Lamp Type
  • LED
  • Incandescent
  • Fluorescent
  • Compact Fluorescent
  • ATSD20/BCCR20 not recommended for use with switched HID lamps
Light Source
  • LED
  • Incandescent
  • Fluorescent
  • Compact Fluorescent
Listings UL
Material - Housing
  • Galvanized Housing (ATSD)
  • Painted Steel (ATSD20/BCCR20)
Mount location Surface
Mounting Type
  • Inside of Ballast Channel (ATSD)
  • Surface Wall Mount (ATSD20/BCCR20)
Type Emergency and Exit

Electrical Ratings

Amperage Rating
  • 3A (ATSD)
  • 20A (ATSD20/BCCR20)
Voltage Rating
  • ATSD: 120/277 VAC
  • ATSD20/BCCR20: 120-277 VAC

Certifications and Compliance

Certified Listed
  • Listed to UL 924 Damp Location (ATSD)
  • UL 1008 Listed (ATSD20/BCCR20)
ATSD Series Specification Sheet
ATSD20 Specification Page
BCCR20 Specification Sheet
ATSD/ATSD20/BCCR20 Catalog Page
ATSD20 Application Guide Brochure
BCCR20 FAQ Brochure
Dual-Lite / Compass Lighting Warranty
ATSD Auxillary Transfer Switch Installation Instructions
ATSD20 Auxillary Transfer Switch Installation Instructions
BCCR20 Relay Control Device Installation Manual
ATSD/ATSD20/BCCR20 Series Availability Document
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