Rule 46-400 is pretty clear. I understand that somewhere down the road someone might install a switch, timer or ?...
Let's look at it this way.
Scenario one.
Tie the battery packs to the local lighting lighting circuit. Install the exits on a separate circuit as per 46-400. A failure causes the OCP for the exit sign circuit to trip. The exit signs are not illuminated any more. Nobody really notices the exit signs are out for a period of time. A situation arises where the illumination of the exit signs is critical. BUT they are not on.....
Scenario two...
Exit signs and battery packs are tied into a local lighting circuit. A fault causes the OCP to trip. The exit signs are now illuminated through the battery packs...
Can we have some more discussion on this topic please.
