EM Lighting

[Alwayslearningelec]

I'm a little confused. Is this EM wiring diagram if you have EM/Norm on same circuit using an EM battery pack for the fixture? Could this wiring be used if you had a separate EM and Norm( from two diff panels) circuit?
Is lighting fed from EM panel usually unswitched(always on)?

 

[mauk]

Looks to be for when you want designated emergency fixtures to be controlled along with the normal lighting fixtures in a space. This would be for buildings that have an emergency power supply (generator, central inverter, etc.). Yes the emergency source to this device should be unswitched.

In some cases the emergency fixtures are just unswitched from an EM panel and also function as nightlights. That way there would be no need for the transfer relay.

 

[Rock86]

We have had to install these on projects where the em lighting was not properly wired up. You will need two sources. A normal source and and emergency source. The emergency source as Mauk said, would come from an inverter, generator, or other approved emergency source.

This device is so that you can control an individual light or group of lights within a lighting zone. for example; if you have a meeting room and there are 24 lights, but you only want 3 to be EM, and you want those 3 to be controlled from the lighting control circuit, you would use this device to make those 3 lights appear normal until a power loss event in which case they would switch to emergency power.

 

[ron]

You don't use that device for an EM battery pack. It is only for the conditions when the EM and Normal are from different panels, such as an inverter, generator, or other approved emergency source.

 

[Alexis Enrique]

You use this device if you are using a sensor with dimming capabilities to dim the lights on normal use, you notice what trig the EM relay is when you don't have 0-10V from the switch (when it loose normal power). The emergency power is coming from a different source (Generator or Backup power system) if you connect the back power feed to the same circuit it won't work because there is not power on the circuit itself. You need a different source for the EM circuit, that will have power at all time. If you don't have a separate backup power you shouldn't use this device.

 

[Alexis Enrique]

You use this device if you are using a sensor with dimming capabilities to dim the lights on normal use, you notice what trig the EM relay is when you don't have 0-10V from the switch (when it loose normal power). The emergency power is coming from a different source (Generator or Backup power system) if you connect the back power feed to the same circuit it won't work because there is not power on the circuit itself. You need a different source for the EM circuit, that will have power at all time. If you don't have a separate backup power you shouldn't use this device.

Sorry, I was incorrect this is not the case as stayed before, and yes you need two source.