AC main electrical distribution board

A main distribution box is the place from which the electrical energy is protected and distributed over the electrical system in a building.

The power supply cable from the electrical utility supplier terminates in a junction box located in the fusebox. This contains one or more main fuses. The power goes to the kilowatt-hour meter, which measures the energy consumption. The terminal box and the kWh meter are sealed and are the property of the utility operator or the metering company. From here, the power supply cable continues to the group box via a main switch. For electrical devices operating on power current (400 V) such as the inverters, an appropriate switchboard and connection are required to fulfill the (Dutch) SCOPE 12 directive.