mtnelectrical
Senior Member
- Location
- Essex, New Jersey
Is there any code requirements for Emergency/Exit lights height location on a warehouse? Lets say 30 feet high.
You're required one foot candle at the floor for the entire path of travel to the exit. Now that's actually not that much light, so you may be ok.
You're talking exit locator signs, not egress pathway lighting.Isn't there something about being in line of sight along with the door or some such? If too high, a person may not see it or think to look for it.
You're required one foot candle at the floor for the entire path of travel to the exit. Now that's actually not that much light, so you may be ok.
As additional info, I have found that when the AHJ makes a code reference for egress lighting levels, it is usually to the adopted building code first and if it doesn't have a reference, then they go to the life safety code (NFPA 101).This is a common misconception (NFPA 101 7.9.2); it's actually a 1FC average as opposed to a 1FC minimum. There is a maximum to minimum ratio of no more than 40:1, meaning, if you have a maximum of 4FC, the minimum light measured has to be 0.1FC or greater. Average light means nothing without uniformity criteria attached to it. For example, you could have a football field with all of the stadium lights directed to one end of the end zone; it would have the same 'average' light across the whole field, but it would look pretty dark on the opposite side. Now, using those same amount of lights, you equally aim them. Your average would be the same, but your uniformity ratio (maximum to minimum) would be much lower and the field would look much better. All of that to say, whenever you see only a lighting requirement, it's best to see that there is also a uniformity requirement attached to it.
Is there any code requirements for Emergency/Exit lights height location on a warehouse? Lets say 30 feet high.