The remarkable point is that ordinary distribution boxes can only be used in non explosive environments. Explosion proof distribution boxes can be used in different explosive environments according to different explosion-proof types! Moreover, the explosion-proof distribution box is an explosion-proof electrical product that has passed the explosion-proof certification of a qualified third-party inspection organization.
In terms of shape, the ordinary distribution box is made of iron, while the explosion-proof distribution box is processed after casting or steel plate welding, which has high strength.
Structurally, the components in the ordinary distribution box can be arranged together for convenient wiring, while the explosion-proof distribution box is divided into several units, and each switch and electrical components shall be isolated.
In terms of sealing, ordinary distribution boxes do not have strict sealing requirements. The cover and box of explosion-proof distribution box are well sealed. After passing the strict inspection, the certificate of conformity shall be issued by the special organization and sold out of the factory.
In application, ordinary distribution box is generally used in civil and places without explosion-proof requirements. Explosion proof distribution box is mainly used in dangerous combustible gas places and explosive places.
In terms of price, ordinary distribution box is cheap. Explosion proof distribution box is expensive, which is generally several times the price of ordinary distribution box.
Installation: all electrical components of the explosion-proof distribution box are installed in the box and led to the panel through the operating mechanism for operation. It is necessary to operate the switch through the handle. The signal lamp and switch on the panel are explosion-proof components and can be exposed to the air.
The explosion-proof distribution box:
Explosion proof distribution box is a kind of distribution box with explosion-proof performance. It mainly includes explosion-proof lighting distribution box, explosion-proof power distribution box, explosion-proof anti-corrosion distribution box, etc. Explosion proof distribution box is applicable to flammable and explosive places such as petrochemical devices, petroleum platforms, chemical industry, pharmaceutical industry, coal industry, smelting industry, shipbuilding, military industry, textile industry and so on.
According to the actual lighting needs of the work site, determine the installation position and mode of the lamps, and then prepare three core cables of corresponding length according to the distance from the lamps to the 220V power supply contact (if steel pipe wiring is adopted, lead the three core cables into the steel pipe to the installation place of the lamps).
First remove the fixing screw on the wiring chamber and pull out the wiring part of the junction box; Take out the sealing ring and connector (with set screw) from the packaging box and put them into the cable in turn; Then connect one end of the three core cable into the identification "L", "n" and grounding point in the box respectively, press the cable with the wire clamp, fix it with the fastening screw, then tighten the joint, press the sealing ring, and tighten the fastening screw from the side.
Screw the components in step 2 into the steel pipe, install the set screw from the side and lock it, then install the lamp body along the guide rail of the junction box, and then tighten the screws on the panel.
Connect the other end of the three core cable to the 220V power supply according to the requirements of the explosion-proof distribution box.
When replacing the bulb, first cut off the power supply, then remove the set screw on the shell with an Allen wrench, loosen the lamp cover by 6 turns with a large screwdriver or other tools, and then carefully remove the lamp cover by hand, unscrew the old bulb and replace it with a new bulb.