Combine life-safety with non-essential?

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mattressking

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We use a 5kva UL-924 UPS system to supply about 3kva of emergency lighting for store egress. A suggestion has been made to bump the UPS up to 11kva and pick up additional non-essential cash register loads from the same system. Is this acceptable?
 
I believe they need to seperate systems

I believe they need to seperate systems

Loads on Emergency Branch Circuits

No appliances and no lamps, other than those specified as required for emergency use, shall be supplied by emergency lighting circuits.
 
Without a doubt a violation of 700.9(B)

BTW the egress lighting is "Emergency" as covered by Article 700 and the registers would be "Optional Standby" as covered by Article 702.
 
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It would be two separate circuits, each originating from the load terminals of the UPS. Does this make a difference? Under normal power conditions, the UPS feeds normal lighting circuits. The circuits become emergency by virtue of the loss of normal power. I think what it really comes down to is this: is there some event that might happen in the non-essential circuit that could take the essential circuit offline?
 
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