How does a waterproof junction box prevent water from entering?

The main way to achieve waterproof effect is through materials and connections.

1. Material waterproofing: The junction box will use ABS engineering plastic, glass fiber polyester, stainless steel, etc. These materials are inherently waterproof. At the inlet, high-quality waterproof connectors are configured, which can effectively prevent moisture and water from entering.

2. Connection waterproofing: The waterproof junction box is connected by pressing, and the connection point is equipped with a high-quality silicone material-made sealing gasket. After pressing, it forms a vacuum chamber, achieving the effect of isolating water vapor.

After use, the waterproof junction box will undergo a waterproof test. It is conducted through a pressure test method. If the pressure remains stable at 0.4 MPa within 72 hours, it indicates that there is no leakage or deformation, which also proves that it is waterproof.

II. How to choose a waterproof junction box

1. Check the sealing grade

When choosing a waterproof junction box, pay attention to its sealing grade situation. It is closely related to the waterproof effect. We can judge it through the digital marking on the junction box. The first digit represents the box's ability to resist invasion, and the second digit represents the water protection ability. At the same time, the material selection of the sealing gasket also needs to be understood. It is necessary to consider changes in temperature, elongation rate, and compression rate.

2. Check the size

There are many sizes of waterproof junction boxes. When choosing, it is necessary to understand the specific situation of its size. Many people confuse the internal and external dimensions, resulting in a situation where the internal wiring cannot be completed. Therefore, it is necessary to understand the size in advance to select the correct-sized junction box for use.

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