Waterproof junction box
Compared with the splash proof junction box, the structure of the waterproof junction box
is the same except that the connection between the cover 2 and the junction box body L is different.
The structural feature of the waterproof junction box
is that the cover 2 of the junction box and the junction box body 1 are connected by threads. Depending on the tightening force of the cover and the junction box body, the sealing ring made of heat-resistant black rubber is pressed evenly on the whole circumference, so that even if there is serious water vapor or harmful gas, it will be blocked by the well sealed sealing ring and will not penetrate into the interior of the junction box.
The waterproof performance of the waterproof junction box
shall withstand a test with a distance of 5m, a faucet with a nozzle diameter of about 25mm shall be used to spray water in any direction, and the water pressure in front of the nozzle outlet shall not be less than 2kg / cm for 5 minutes. After the test, open the junction box cover for observation, and no water shall penetrate into the interior of the junction box.
The thermocouple and thermal resistance of the junction box with waterproof performance are suitable for the site with frequent water spraying, such as the equipment installed in moldy days or indoor needs to be cleaned frequently. In addition, the waterproof junction box is easy to assemble and disassemble. After the cover of the junction box is opened, it is connected to the junction box body with a chain, so it will not be lost. These are more suitable for high-altitude equipment.