IMHO even though it's tiny now skin-shocks can go critical fast.
Multi-meter / AC amps 10 amp setting while measuring the following outside the rig.
WEAR A PAIR OF DRY KITCHEN SCRUB GLOVES !
Stick one probe into wet earth then scratch the other probe into bright aluminum somewhere on the skin.
Look at the meter reading as you scratch the 2nd probe to the skin because now you are making a better contact between line to ground. If you get an amperage value note it then disconnect shore power. One amp of 120 vac can kill you in one second.
