Nitrous pics

Can I use the ground wire to activate the selenoids. Less chance off shorting out if a wire gets pinched or something.
I wouldn't see any reason why not but you still have to have a power wire going to them. I just used fuses coming off of any power lead to them.. also I activated them with a relay.. on my set up the low power activation wire to the relay first goes through a arming switch then to my activation switch on my shifter then through the full throttle switch up near the carburetors. Also it sends a low voltage signal to the timing retard. on the ground side of the relay it's hooked through the low pressure switch on the fuel system and ends up at the window switch.... Any wire coming off of the initial power wire has a fuse...