Re: Fire Alarm Cut Off
It's taken me this long to realize (after much googling) that "AHJ" isn't "Alternative Health Journal" 
I've dealt with the "Fire Marshall", Department of Building and Safety (DBS), The Electrical Inspector, etc..
Anyways, a few jobs ago the electrical contractor just provided us outlets that were on fire-panel actuated contactors. We just did a normal rack install and never had to worry about dealing with any of it as the moment the alarm sounded the entire rack was powered off. (I eventually moved the system processor to a UPS because they kept testing it while I was trying to program, but all six outlets and the amps plugged into them lost power instantly.
Worked better than some sequencer rigs I've done before as fire-marshals would get antsy at the delay while it cycled down the steps.
-I had them add a couple more to dump the two 20A circuits on stage so backline and monitors would die too. The effect was quite good as emergency lights would kick on as well as the strobes and buzzers at the same time as all sound stopped cold. (you really need to grab drunk-people's attention sometimes)
-now if only you could get something to stop a drummer suddenly, -a trapdoor wouldn't work as I would have been tempted to use it way too often 