How to do the wiring inside the distribution box
The wires should be bent consistently and without dead bends to prevent damage to the wire insulation and internal copper core.
The wiring in the Power distribution cabinet box should be straight and without any ribbed connections. The wires should be tied with plastic ties of appropriate size and uniform spacing.
The neutral wires between each wire distributed from each phase of the main switch shall not be shared. For example, if the first yellow wire distributed from phase a is connected to two 16a lighting circuit breakers, the primary neutral wires of these two lighting circuit breakers are also distributed from the primary side of these two circuit breakers and directly connected to the neutral terminal.