Electricity is essential in life. Only with electricity can we feel light in the dark, and the Distribution Board is a complete set of devices for centralized installation of switches, instruments and other equipment.

What is the general wholesale size of Distribution Board? The specifications selected for different functions are different. Generally speaking, if the Distribution Board is used for lighting wires or small power, when the incoming line is less than 10 flat and the number of switch bits is less than 20, the switch width plus 20mm on each side is the width of the box, the height is the switch height plus 40mm, and the depth is the switch depth plus 10mm.

When the electric box is a power electric box, the calculation method is actually similar to that above. However, when the incoming line is greater than 10 flat, the bending radius of the incoming line should be considered. Sufficient space should be reserved for the incoming line of the primary wiring terminal. When the switches are arranged in two rows, the wiring route of the switches should be considered.

Fire prevention measures for Distribution Board:

1. The distribution room of Distribution Board wholesale shall be equipped with a certain number of fire-fighting equipment;

2. Each oil filled electrical equipment, such as circuit breaker and voltage transformer, shall be installed in the interval with partitions on both sides. When the total oil volume exceeds 600kg, it shall be installed in a separate explosion-proof room; If the total oil volume is more than 60kg, such as oil immersed voltage transformer, there shall be oil storage facilities or oil retaining facilities.

3. Connecting cables, buses, ventilation pipes, etc. pass through walls, floors and floors, leaving holes, which shall be blocked with refractory materials to prevent the expansion of fire after the fire of oil filled equipment; 4. The high-voltage distribution room shall be of class I and II fire resistance rating. The fire resistance rating of low-voltage distribution room shall not be lower than grade III. The windows of the distribution room shall be provided with waterproof, rain and snow proof measures and small animals. The distance between them shall not be less than 1m when they are in the same high and low voltage distribution room.

Whether the incoming high-voltage cable and branch high-voltage cable have overcurrent, overheating and peculiar smell. Whether the high-voltage fuse is intact, and whether the fixed contact and movable contact of the wholesale high-voltage disconnector and load switch of the Distribution Board are in good contact; Whether the three-phase current of the turnover cabinet, incoming cabinet, metering cabinet, Pt cabinet (voltage transformer cabinet) and transformer output cabinet is normal; Whether the temperature and humidity are normal.