The distribution box is divided into power distribution box and lighting distribution box, which are the last level equipment of the distribution system. Both are strong electricity.

Lighting distribution box: the incoming line is 220VAC / 1 or 380avc / 3, the current is below 63A, the load is mainly the illuminator (below 16a) and other small loads, and the air conditioner in civil buildings can also be powered by the lighting distribution box. The selection of lighting distribution circuit breaker is generally distribution type and lighting type.

Power distribution box: incoming line 380avc / 3 is mainly used for power distribution of motor and other power equipment. In addition, when the total incoming line current of lighting distribution is greater than 63A, it is also classified as power distribution box. The power distribution circuit breaker shall be power distribution type and power type.