Home Wiring Technique
At home, three wires from the pole / green box transformer are connected through the wattmeter and then enter the main service panel based on long copper rods that are moved to the ground or to the steel at the home ground.
The A-phase and B-phase cables that enter the main panel are connected via the main breaker, while the neutral wire is connected to a terminal called a neutral bar or a neutral bus. The ground bar may also be found in the main service panel. The ground bar is connected to the base rod or to base steel support. In the main service panel, neutral bars and ground bars are joined together (they act as one).