How to distribute current direction in a distribution box

‌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. ‌Binding Requirements‌: The wires should be bound with plastic ties. A distribution board or distribution box is where the main power supply is distributed to multiple loads. Direction is identified by the sign of the current with respect to a reference direction, which is in turn defined with respect to a reference voltage polarity. [pdf]