I have recently purchased a 6500W portable generator. You know the type; wheels on one end, handles on the other, move it around like a wheelbarrow.

The instructions tell me to connect this generator to the building ground bus, GEC, or ground rod.

Huh?

Can someone please explain just what this is supposed to accomplish? The generator is designed only for the use with cords. It has receptacles. Just what will a connection to the service ground do when everything is powered by an extension cord?

Any thoughts?