Distribution Board

Distribution Board Points : Distribution Board “An assembly of parts, including one or more fuses or C.B’s arranged for the distribution of electrical energy to final sub-circuits or to other distribution boards.” it is a main consumer’s controlling point. The electricity company referred to every consumer to install a distribution board. The outgoing wires of the energy meter are in actual the incoming wires of the distributor board. The supply ends of all the circuits should must, be brought back to a specified point in the installation and these connected in parallel on a distribution board.’ in small installation, for example domestic or shop etc. require only one distribution board. The distribution boards are consists on fuses, circuit breakers and main switch.

We controlled the supply of our house from this distribution board with the help of main switch or circuit breakers; when we change the position of the main switch button, the whole supply of the installation is becomes dead. Large installations such as flats, commercial building etc. have several distribution boards. Every distribution board supply electricity to one floor of the building.

In large installations, all the distribution boards are controlled from main distribution board. The incoming supply of the main distribution board is three-phase. From main distribution board, we obtain the phases and every phase supplying electricity to one floor or more than one floor of the building. It is remember That, every floor has its own distribution board. For domestic premises, it is always recommended that the single phase supply is introduced.

The protective devices (fuses, circuit breaker) must be capable of opening the circuit instantaneously in case of short circuit.

“A distribution board is a unit .which consists on one or more protective devices against over current. The distribution hoard also delivered electrical energy to the circuits of, installation”.

In fig (51.1). (5.2.1), (5.3.l).and (5.4.1) distribution of electrical supply.