Em power and normal power in sam raceway
- Thread starter jkrauss
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Joe Villani
Senior Member
- Location
- Westchester County NY
Is the site lighting actual emergency power as require by building code?
Typically the emergency lighting requirement ends at the exterior of the exit doors, usually accomplished by battery pack type lighting.
I am just asking because there is a fine line between an actual emergency system versus a legally required standby system, most confuse the two and just call them emergency.
Typically the emergency lighting requirement ends at the exterior of the exit doors, usually accomplished by battery pack type lighting.
I am just asking because there is a fine line between an actual emergency system versus a legally required standby system, most confuse the two and just call them emergency.
Still cannot make the distinction from here, without assumption. Is it a legally-required emergency system? If it is, you are likely in violation of 700.10(B).
- Location
- Massachusetts
Site lighting, even when supplied by a generator is not 'emergency' it is optional standby and the wiring can be with normal wiring.
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
If the standby power were for the actual computers and the transportation system would be shut down in a hazardous (to life) way if the computers failed, then it might well be emergency power, or critical operations power, or whatever.
Since the OP refers to just lighting, even though it is for the data center, I agree that mixing would not be a problem.
Since the OP refers to just lighting, even though it is for the data center, I agree that mixing would not be a problem.
- Location
- Massachusetts
In that case I would think they would be 'legally required' article 701 and still can be mixed.
david
Senior Member
- Location
- Pennsylvania
You need to ask the design professional,
Nothing says that the normal egress lighting for an exit has to be mounted to the building.
If for instance the parking lot light is providing normal lighting by an exit instead of a wall pack.
I do no of any requirement that dictates that a pole fixture cannot provide the correct level of lighting to be considered egress lighting. This came up on a rear exit at final a while back.
The loss of the panel for the wall packs no emergency lighting, yet when the pole lights where lost the emergency gen kicked on. The pole lights provided enough normal lighting source to be considered egress lighting.
- Location
- Massachusetts
I am going to disagree here, if the lights are not required egress lighting they can not be added to an emergency supply. They would be optional.
In what scenario are parking lot fixtures required egress lighting?
If they where required they had better be equipped with re-strike lamps as well.
david
Senior Member
- Location
- Pennsylvania
The emergency lighting only is required to continue during the cool down recovery of the normal lighting source for those short time outages, and they did, the design engineer used the placement of the pole light to act as the egress on back side of the building,
Do you see a violation in that design?
There was one pole (two light) that came on during an outage that provided egress lighting during the outage if i remember correctly it was not an HID fixture
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