APPENDIX G: MASTER ELECTRICAL CUT-OFF SWITCH
G.1: The driver, when seated normally with the safety belts fastened, and the steering wheel in
place, must be able to cut off all the electrical circuits, except the circuit for the fire system, by
means of a spark proof breaker switch. This switch must be located on the dashboard, or center
console, and must be clearly marked by a symbol showing a red spark in a white edged blue triangle.
2008 PRR 140
G.2:
If the master electrical cut-off switch used by the driver is located within 12” of one of the front
door window openings a second electrical cut-off switch is not necessary. Otherwise, a second
cut-off switch must be fitted which must cut all electrical circuits (ignition, fuel pumps, alternator,
lights, battery, etc., but not the fire extinguisher system). It also must be clearly marked by a spark
symbol on a blue triangle. The approved locations for the second switch are; along the A-pillar,
along the B-pillar, or on the windshield cowl. The second electrical cut-off switch shall be located
in close proximity to the second switch/apparatus for the fire extinguishing system.
G.3:
If the car is a formula car, or sports racer, the preferred location for a second cut-off switch
is the right main roll bar tube at approximately driver’s shoulder height.
G.4:
Any exposed electrical contacts on switch shall be covered to prevent sparking.
Says the same thing as the GCR essentially?
Greg, The solenoid is normally open
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