Single Phase Meter Switch Board Wiring Diagram and Connection

Work & Installation (Input → Output)

It starts at the stage of the incoming of the electricity provider and neutral lines. These lines are initially introduced to the energy meter, and they are used in the measurement of the consumption. Based on the meter, the phase and neutral are linked to the main MCB of DP, and both wires are disconnectable in case of danger. The output of the main switch is then fed to the distribution board, where several sub-MCBs are fitted to various circuits. The MCBs are used to protect specific load circuits of lights, fans, sockets, geysers, or air conditioners. Every load circuit is properly grounded to prevent electric shocks. The wiring is finished by the connection of the corresponding loads to the sub-MCB outputs. This installation is sufficient to distribute electricity in the house systematically and to protect it completely.

Testing & Final Adjustments

Following the wiring, it should be thoroughly tested. First, ensure that the main DP switch and MCBs are properly rated, as they should be based on the load requirement. Turn on the service supply and check the energy meter reading to make sure that the phase and the neutral are connected. Each sub-MCB must be testable one by one, i.e,. put on, and then the loads connected would be observed. The MCB is supposed to trip immediately in case it is overloaded, and this is evidence that the protection is working as it should. Earthing resistance also ought to be verified and maintained under 1 ohm in order to be safe. Measurement of voltage across each load point should be done to ensure that there is an appropriate distribution. The DP switch has to de-energize the phase as well as the neutral. All loose connections must be tightened, and cable insulation should be checked to prevent future faults. Once the tests are successful, label all the circuits (lights, fan, sockets, geyser, AC, etc.) to identify them easily. Last-minute refinements provide safe, dependable, and extended working of the domestic wiring system.