Emergency lighting on 208 volt circuit

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lumenpro

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I have 208 volt high-bay lighting circuits that I want to connect emergency lighting unit equipment battery packs to which will power remote low voltage heads. I want to add a neutral conductor and connect the units as 120 volt input. The breakers are 2-pole but our inspector cites 210.4 as prohibiting this... am I missing something? Article 700.12-(F) clearly states that the unit equipment must be connected to the lighting serving the area.
Any help is greatly appreciated!
 
I can see nothing wrong with what you have done here. 210.4(C) Exception #2 seems to allow this so long as the lighting circuit you have utilized uses the proper circuit breaker that will simultaneously open all non-grounded conductors. If I am wrong, then I'm gonna learn something new today!:)
 
Thanks for the validation ramdiesel!

I assumed that this method would satisfy the code requirement to have emergency units monitoring the general lighting circuits but still be within the multi-wire branch circuit provisions. We actually have a natural gas fired generator for emergency power but it won't come online in 10 seconds... so the emergency units are for "bridging" illumination until the gen set powers the emergency circuits.

I know, I know - should have gone with diesel!

You have a great day as well!
 
700.16 Emergency Illumination
Blah,blah,blah
Where high-intensity discharge lighting such as high- and low-pressure sodium, mercury vapor, and metal halide is used as the sole source of normal illumination, the emergency lighting system shall be required to operate until normal illumination has been restored.

Do you have restrikes? Time delay? Or other means of illumations until they refire, or are you using a type of high bay that does not delay to re-fire.

Jim
 
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