Earth grounding

[OffGridForGood]

Think of the grounding as a means to bring all metal that you could touch in the system to the same electrical potential as the earth, which you can also be touching - directly or indirectly such as touching a faucet.
If the metal for any reason is exposed to a charge potential, you will be safe to touch it, because that charge has an easier path to ground than your body.

 

[robbob2112]

I think I'll be in the airplane if I can find the keys, the portable flightline, and the lightbulb repair kits.