I'm installing a 4psi electric fuel pump for triple Webers and am going with Ford inertia switch, in the past when I have done this I have always used the switch to kill the positive side but now I'm wondering if there aren't some benefits to killing the negative side instead.  The neg lead is isolated from the metal housing.

Any thoughts?

 

Either way you break the circuit and stop the pump if the inertia switch is tripped.

If any of the wire on the negative side of the pump before the switch gets pinched and grounded the switch won't help.  Unless you mount it close to the pump.  So, at least be careful with how you run the ground wire.

Edited August 29, 20231 yr by Zed Head

Okay, so no real advantage and some possible drawbacks, thanks, I'll stick with the way I know.