Components commonly found in distribution boards include:
- MCBs (Miniature Circuit Breakers): Protect individual circuits from overcurrents.
- RCDs (Residual Current Devices): Detect earth leakage currents to prevent electric shocks.
- RCBOs (Residual Current Circuit Breakers with Overcurrent protection): Combine the functions of MCBs and RCDs in a single unit.
- Main Switch: Provides a means of isolating the entire consumer unit from the mains supply.
- Surge Protection Devices (SPDs): Protect against transient voltage surges.
- Busbars: Distribute the electrical supply from the incoming terminals to the protective devices and outgoing circuits.