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Front photo of Emergency Lighting Control Unit for KO Mounting with wiring

Emergency Lighting Control Unit for KO Mounting, USA

ELCU-200-U Wattstopper
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Wattstopper's ELCU-200 Emergency Lighting Control Unit is a self-contained device that allows any standard lighting control device to control emergency lighting in conjunction with normal lighting in any area within a building.
BAA Yes
Voltage 120/277 VAC
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Features

Features

  • Eliminates energy waste caused by emergency lighting that is always on
  • Integral push-to-test button activates emergency mode for a true test condition
  • Connects to EMTS-100 Remote Test Switch or other input to activate emergency on from a remote location
  • Operates as a control device or as a shunt
  • Senses local single circuit power failure
  • Zero cross switching technology for reliability and increased product life
  • Compatible with Wattstopper occupancy sensors, daylighting controls, lighting control panels, and dimmers
Specifications

Specifications

General Info
Color Red, White
Product Series ELCU
Type Emergency Load Controller
Material ABS
Application Sector Commercial
Product Line Wattstopper
Country Of Origin United States
Features Push-to-Test on Device
Installation Location Above Ceiling
Warranty Type 5-Year
UPC Number 754182928132
Dimensions
Product Depth US 1.9 in
Product Height US 3.0 in
Product Volume US 26.1 cu in
Product Width US 2.2 in
Product Weight US 0.3 lb
Trade Programs
BAA  Yes
Additional Information
DesignLights Consortium Qualified System Yes
Security   Yes This product is ioXt certified
RoHS Compliant Yes This product meets the material restrictions of Article 4 of the RoHS Directive (2011/65/EU), including Commission Delegated Directive 2015/863.
Technical Information
Wire Connection Type Flying Leads
Compatibility EMTS-100
Contact Configuration N-C
Contact Rating 24 VDC
Indoor/Outdoor Indoor
Input Voltage 120 to 277 VAC
Line Frequency 50 Hz, 60 Hz
Load Rating 10 A @ 120 VAC, 20 A @ 277 VAC
Location Rating Dry
Mounting Type 1/2 in Knockout
Number of Relays 0
Operating Temperature 32°-131°F
Operating Temperature Max 131 °F
Operating Temperature Min 32 °F
Operating Humidity 5-95% RH (Non-Condensing)
Storage Temperature 23° - 176° F
Resources
Reviews

Reviews

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Questions & Answers

Questions & Answers

Will this work with 120 volt emergency and 277 volt normal power

Asked by: Pete Richmond
Yes, it will work, the normal power and emergency powers are completely isolated.
Answered by: Tier 1 Tech Support
Date published: 2025-10-28

Installed ELCU to interface with the fire alarm system. cut the Test Loop wire andbconnected to the other ELCUs on the entire floor. After fixing the polarity of the run I installed the final ELCU, now all Emergency lights turned on and there is clicking?

Asked by: Brian D.
Please reach out to our tech. support team for further assistance troubleshooting this issue. Legrand Technical Support: Phone: 1 800-879-8585, Option 3 then Option 1 Mon - Fri: 7am - 7pm CST (excluding holidays)
Answered by: Tier 1 Tech Support
Date published: 2023-03-27

Is this compatible with 277 volt emergency and 120 volt normal power, fixture drivers are multi-volt.

Asked by: Jimmy P.
Hi Jimmy, Yes, it is, please follow the wiring diagram and keep the different voltage neutral wires isolated.
Answered by: Tier 1 Tech Support
Date published: 2022-12-16

Can i use the ELCU to control/dim a LED fixture with integral emergency battery?

Asked by: WL
Good morning The ELCU does not have dimming capability so if you are trying to dim LED fixtures I would recommmend that you use a control modular like and LMRC 211 which is 0 to 10 volt dimming with the ELCU.
Answered by: Tier 1 Tech Support
Date published: 2022-09-15

Re: ELCU-200-347 Are the contacts rated for 20 amps , the spec sheet indicates 16a @120-347VAC Max Load Requirements . Please Clarify Thanks

Asked by: David
The ELCU-200-347 is rated for 16amps @120-347vac
Answered by: Tier 1 Tech Support
Date published: 2022-11-25

Good afternoon, can you control different lights in different rooms with one unit? Or do you have to install one device per room.

Asked by: Roman
You could if you run the lights in parallel but when you are trying to control certain lights in one area other lights may come on that you may not want to use at that moment in another area. I would recommend one per a room.
Answered by: Tier 1 Tech Support
Date published: 2022-06-21

Is the EL-CU-200 rated to switch LED drivers?

Asked by: Joseph
Yes, it can switch up to 20A of LED fixtures. But I would de-rate your load to much less because of the LED inrush and other issues. A 10A LED load is huge these days.
Answered by: Gordo
Date published: 2021-02-05
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