This guide covers split load vs dual RCD vs RCBO board configurations, circuit arrangement and allocation, BS 7671 labelling requirements, type testing under BS EN 61439, SPD installation, wiring best practice, and the common mistakes found during EICR inspections. This guide shows you how to organize circuit breaker wiring properly. Circuit breaker wiring configurations involve organizing main switches, busbars, and branch breakers within a distribution box. Proper setups. PRO TIP: Wiring a panel is complicated, so many electricians divide the task into steps—cutting wires to length, stripping wire ends, bending wires toward a bus, tightening bus screws—and perform each step on all wires before going on to the next step. This greatly speeds a task because each step. Connection method: Each switch takes a wire from the incoming point and connects it to the incoming end of the switch, or uses parallel connection to reduce the difficulty of wiring. Wiring Direction: Wiring between the main circuit breaker and each branch circuit breaker in the box generally. Learn how to professionally wire and organize an electrical distribution board in this step-by-step guide designed for DIY enthusiasts, electricians, and anyone looking to ensure a neat, safe installation. We cover everything from separating color-coded wires and securing them with ties to. Circuit breakers are automatic switches that protect individual circuits from overcurrent conditions. The Main feeder cable to the Distribution Board should be able to handle the total power anticipated when all the sub circuits in the Distribution Board.