Wiring Direction: Wiring between the main circuit breaker and each branch circuit breaker in the box generally goes on the left, and the wiring out of the distribution box generally goes on the right. Covers wiring, placement, standards, and expert tips for a compliant setup. It is responsible for distributing electricity throughout a building, ensuring that each circuit receives the proper amount of power. Wire color: The neutral wire is blue, and the color of the phase wire (A phase is yellow, B phase is green, and C phase is red). The electrical system in a building is a complex network that delivers power from an external source to internal circuits. The primary objective of an electrical.