Gentlemen:
Let me add a little:
For "most" of our regular clients, the installation of "additional" em lights is a normal thing, as they have concerns about safety. However, the units are "additional" and are not "code required".
I had an instance where we had to install an em pack at the outside of a small retail store in a shop. ctr. The property manager balked at the requirement, and went to the Fire AHJ. That resulted in having to install two (2) exterior units, 1 in the restroom, and two additional exit units. The AHJ cited the "fire code" and that was that. I did not inquire as to what chapter and verse, but when I talk to that AHJ again, I'll inquire.
Additional units must conform to NEC requirements, require permits and inspection, and have to be maintained. It's always good to CYA.
John
