(1) construction of power distribution system should set up a general distribution boxes, distribution boxes, switch boxes, and in accordance with the "one-minute-open" order of graded sets, and form a "three-tier distribution" model.
(2) distribution system for construction of distribution boxes, switch box installation location must be reasonable. Consumer unit as close as possible to the transformer or power supply Department, to the introduction of power. Distribution box should be installed in electrical equipment or load the relative concentration of the Center, ensure a balanced three-phase loads. Install switch box should be on the spot, circumstances and conditions as close as possible to the control of electrical equipment.
(3) in order to ensure temporary power distribution system of three-phase load balance, construction site power electricity and lighting should be two electric circuits, power distribution chest and lighting distribution box should be set up.
(4) all electrical equipment in construction site must have its own dedicated switch box.
(5) distribution box within the box and set up at all levels must comply with safety requirements, the switch should be marked, box number. Stop the distribution box should be used to cut off the power supply, door locked. Stationary distribution box should set the fence and drop-rain-proof measures.
(6) difference between distribution boxes and distribution cabinets. According to the GB/T20641-2006 of the low-voltage switchgear and control equipment General requirements for empty shell