1) Generally, the incoming line of power distribution box adopts five wire system, i. three phase lines a, B and C (generally yellow, green and red), one zero line (light blue) and one ground line (yellow with green stripes). Each of these wires has a specific, non-negotiable purpose: The Phase Lines : You've got three of these bad boys – A, B, and C phases. By convention, we use yellow for A phase, green for B. The distribution box is the central hub of the home circuit and the general control of our daily power consumption. It is an indispensable electrical equipment. Wiring Direction: Wiring between the main circuit breaker and each branch circuit breaker in the box generally. In the USA and Canada (following NEC and CEC), distribution transformers typically receive 4. 2 kV on the primary side and step it down to 120V single-phase and 120/240V split-phase for residential applications. The primary side of the distribution transformer is supplied by two conductors. Distribution Board or DB is an electricity supply system or a common enclosure that distributes the electrical power feed into subcircuits. Choose the right box based on environment (indoor/outdoor), load capacity, and durability. Ensure safe placement: install in.
