I am attending a horse show this weekend at a new (to me) location. The prize list says to make sure your trailer is grounded. I didn’t understand why, but I was talking to a client, and apparently parking under high voltage wires can cause the trailer to pick up a current and shock the horse (or person), so I assume this place must have high voltage wires in the trailer parking area.
How does one further ground a trailer so that this isn’t an issue?