What are the thoughts on where to wire electrical fire supression system? directly to battery (ie: always enabled), after master cut-off switch, or from ignition switch.

 

The fire system arming and firing circuit must remain powered independent of the master kill switch.
Last thing you want is to have a dead fire suppression system when you are sitting in the car and a corner worker has hit the master kill, as they are trained to do.

 

Hmm, aren't electrical fire systems self contained? My Spa has a self powered controller.

 

Mine also has it's own 9V battery. No connection to the car's electrical at all.

 

I have Firebottle (halon, or what ever they'er filled with now) system and it's electrical shows using car battery. Looked at the SPA AFFF systems, but too much risk up here of freezing.

 

Freezing , what no global warming in ohio mate

 

I have a mechanical cable on my fire system. Simpler in my mind.