Plumbed in usually has 3 exits, fuel rail, drivers feet and over the fuel tank, by fuel filter in the back.
If all linked up and pulled at correct point, can save the car. I crashed as Spa and the car caught fire, whether the FE put it out, or it was a simply a flash fire is paddock debate, but I didnt think twice about pulling it!
Also, have FE in the garage, as I am likely to be around at the start of a fire (probably being the cause!! 😳 )