Power Distribution in Phase

Short answer: Smoke.

Systems can be out of phase if the wiring between the different sources have been switched or if one system is supplied by a generator and one is supplied by utility.

Are both phases supplied from Utility?

The voltage will determine the testing methods to be used to if system are out of phase.

Imagine you have a 3phase distibution system for your draws.

To be in balance each phase would draw the same amount, and the neutral and ground would not be needed.

Imagine that your distribution system was drawing all towards one leg, and nothing was drawing on any other of the two other hots, or grid or curcuit phases.

Anyway the thing to do is make all the feeds feed equally so the neutral does not become a hot. - or too hot.

What you do is add up your set loads and then distribute them between the phases, legs, hots, whatever you want to call them, so you are in balance. The neutral carries around in the circuit what is the out of balance load between the phases.

The scenario is I have a 100 amp draw from a 10 thousand Watt Light on one leg, and a 5K and a 2K on another, and a 500Watt and a 5K and some coffee maker and a hair dryer and lights in the trailer on on another leg so I am out of balance but within ranges the Generator can handle as long as the neutral is hooked up and the ground is solid.

I'm tired and I am rusty, but basically don't ask one leg for all of the service.