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).
However, in the subprocesses (service panels that get their power from the main service panel but which are located far from the main service panel), neutral bars and grounds are unified. On the other hand, the sub-panel bar receives the ground wire from the main service panel.
Often the metal channel used to transport wires from the main service panel to the subpanel is used as a "ground wire." However, for certain critical applications (e.g., Computers and life support systems), ground wire may be included in the channel. Additionally, if a subpanel is not located in the same building as the main panel, a new ground rod is usually used for the horizontal subprocess. Note that different regions in the United States can use different wiring protocols.
In the main service panel, there are two bus bars entering the circuit breaker module. One of these bus bars is connected to A-phase wire; the other busbar is connected to a phase B. For a power of a 120-V load (eg, Upper-level lamp and 120-V booth), you discard the main breaker to the dead position and then insert the single-column breaker into one of the bus bars. (You can choose either the A-phase bus bar or the busbar phase B.
The choice of bus bar you use only becomes important when it balances the whole load-more in one second.) Next, you take the three-wire 120-V wire and connect the cable (heat) cable to the casting, connect the cable (neutral) cable to the neutral bar, and connect the ground wire (green or empty wires) to the basement bar. You then run the cable to the 120-V load position, connect the hot and neutral wires across the load, and weld the ground wire to the load case (usually the ground screw is supplied on socket mounts or light pictures for this purpose).
For another 120-V power load using their own casting, you basically do the same thing you did in the final setup. However, in order to maximize the main panel capacity (or subpanel) to provide as much time as possible without unloading the main circuit breaker in the process, it is important to offset the number of loads associated with the A-phase breaker with the load number connected to the phase breaker B.
This is referred to as balancing loads. Now, if you want to supply power to 240-V equipment (for example, ovens, washers, etc.), you enter a two-way pile break between the A-phase and B-phase bus bars in the main panel (or subpanel). Next, you take the 240-V three-wire cable and plug one of its hot wires to the break-A-phase terminal and attach another heat wire to the breaker B phase phase. Ground wire (green or naked) is connected to the basement bar.
You then run the cable to where the 240-V loads are located and attach the wires to the corresponding load terminals (usually in the 240-V socket). Additionally, 120-V / 240-V equipment is wired in the same way, unless you use a four-wire cable that contains an additional neutral wire (white) connected to a neutral bar in the main panel (or subpanel). (As a practical note, you can use a 120-V / 240-V four-wire cable instead of a 240-V three-wire cable for 240-V applications-you only leave neutral wires in this case.)
As a note of caution, do not try to make wiring at home unless you are sure of your abilities. If you feel that you are capable, make sure you reverse the key breaker before you start work in the main service panel. When working on lighting fixtures, switches, and branches connected to individual casting, mark the casting with the tape so that you can not mistakenly turn the wrong casting when you re-test your connection.
