NASA 2018 Fire System Rules
15.1 Fire Extinguisher
All cars without a fire system shall have at least a fire extinguisher securely mounted inside within driver’s reach while normally seated, belts fastened and steering wheel in place. The bracket shall be metal and of the quick release type. The mounting hardware shall be bolted through. Fire extinguisher bottles made of plastic or aerosol-type cans are prohibited.
The following chemicals are allowed: Halon 1301, 1211, or Halotron I, hexafluoropropane, HFC-236a, CC0610, FE-36, two (2) pounds minimum; ABC dry chem., two (2) pound minimum; 10BC potassium bicarbonate (Purple K) or sodium bicarbonate; or 1A10BC multipurpose, ammonium phosphate and barium sulfate or Monnex. All fire bottles should have a gauge indicating their charge status (which should be in the green range). Any bottle without a gauge should be weighed to determine content. Once a bottle has been even slightly discharged it should be replaced or refilled
15.2 Fire System
It is highly recommended that a fire system be installed (required on some cars, as specified in class rules). An on-board system uses lines routed through the car with a single actuator to engage in case of emergency. An on-board system shall use Novec 1230, Halon 1301, 1211, or Halotron I, hexafluoropropane, HFC-236a, CC0610, FE-36, five (5) pound minimum, with a minimum of two (2) nozzles (one (1) in cockpit and one (1) in engine bay) with manual or auto release. Other agents in SFI certified systems are acceptable. Systems may also use AFFF material (e.g. SPA Lite, ZERO 2000, Coldfire 302) 2.25 liter minimum. If such a system is used, the appropriate atomizing nozzles shall be used.
All AFFF internally pressurized system bottles shall use a working pressure gauge. All AFFF bottles shall be marked with the recommended “filled weight.” All system cylinders should be securely mounted with bolts. On-board systems may also use CEA614 provided that the lines and nozzles are replaced as per the manufacturer’s (3M) instructions. If an electric solenoid or switch is used to activate the fire suppression system, it should not lose power when the electrical master switch or vehicle ignition switch is turned off.
15.3 Fire Extinguisher / Fire System Required Decal
Vehicles with a fire extinguisher or suppression system must display one (1) “E” decal on the outside of the vehicle identifying the location of the fire extinguisher. The decal should be placed closest to the entry point of the vehicle where the fire extinguisher is most accessible from the outside. This decal indicates to someone assisting the driver where the easiest access point is located. On vehicles with fire systems, one (1) decal is required at the release switch or button, as well as one (1) on the outside of the vehicle.