Explain how to wire a three-phase supply to three single-phase sockets using an educational board.

The main power enters the board with three Live phases (L1, L2, L3), one Neutral (N), and one Earth (E). On the board, these would connect to designated input terminals, often color-coded (red for Live, black for Neutral, green for Earth).

Each of the three incoming Live phases (L1, L2, L3) is connected to the input terminal of a separate circuit breaker. This ensures that each individual socket circuit has its own overcurrent protection.

The output terminal of each circuit breaker is then connected to the Live terminal of one of the three switch sockets. For example, the output of the breaker connected to L1 goes to Socket 1's Live, L2 to Socket 2's Live, and L3 to Socket 3's Live. This balances the load across the three phases.

All the Neutral terminals of the three switch sockets are connected together to a common Neutral Bar. This Neutral Bar is then connected to the main incoming Neutral supply.

All the Earth terminals of the three switch sockets are connected together to a common Earth Bar. This Earth Bar is then connected to the main incoming Earth supply, providing a safety path for fault currents.

Once wired, each socket can be used to power a single-phase appliance. The circuit breakers protect each socket individually, and the Earth connection ensures safety.