why would this happen

I just hooked up my gerotor fuel pump and i wanted to see if all the connections were good so i turn on the ignition and the ss braided line got really hot. there is no fuel in the system. part of the fuel line was touching the frame and it seems as if there might be voltage running through the braid and shorting to the frame causing the line to get hot.

Any reason why this is happening? could it be as easy as i dont have a ground strap for engine to frame yet?