Your day’s assignment is on the functioning of an electrical panel. The electrical service panel allows to break the circuit of the current flowing the parts that you want to work on, so that that you can do it safely. You may want to call it a load center and you are still right.
Power coming from the utility is distributed at load center to the various switches in the home. The main load center can be supplemented with an additional electrical panel, which can be of a smaller capacity, just to enhance the capacity of the main one. Inside the electrical service panel, are circuit breakers which will allow you to stop any current flow to the parts you want to work on.
Circuit breakers are many, but there is one big one called the double -pole service connect. As you open the door of the panel, what you will see first are the main circuit breaker owing to its size and conspicuous positioning, which is normally at the top, and sometimes at the bottom or the sides. The sole work of the circuit breaker is to manage power flowing to the rest of the circuit breakers.
The two wires entering the main circuit breaker from the sides, are called hot bus bars. The main circuit breaker has another function of positioning the wires, so that they can supply electricity to the rest of the circuits. Again, there are other two wires which come out of the main circuit proceeding to the various destinations.
Upon leaving the hot wires, the electric current will work through various electric appliances such as light bulbs and outlets. Upon return to the electrical service box, the current will do so through neutral wires, which are always white, which are then connected to the neutral bus bar. Then the bar connects to the main electrical service neutral which returns the current to the utility grid, and the cycle continues.
Also, the neutral bus bars connected to the ground will get connected to the main electrical service panel at the main bonding point known as a jumper. Moreover, in order to control the effect of stray currents, another connection is made between the neutral wires to a rod at the ground using a copper wire.
Depending various factors, it can be prudent to make an independent connection between the neutral wire to the ground rod. Here, the ground bus bar connected directly and electrically to the neural bus of the main service panel.
A thorough understanding of the electrical panel will enable you to do your assignment safely.