Choosing a waterproof junction box suitable for outdoor cable equipment connection needs to consider a number of factors, the following are some of the key selection points:
Main selection criteria
1. Protection Level (IP level)
Outdoor use requires at least IP65(dust and spray water resistant)
IP66 or IP67 is recommended for wet or rainy areas (resistant to strong spraying or temporary flooding)
Possible flooding requires IP68(Continuous Flooding Protection)
2. Material selection
Engineering plastics (ABS/PC) : lightweight, corrosion resistance, good insulation, suitable for general outdoor environment
Metal (aluminum alloy/stainless steel) : high mechanical strength, good heat dissipation, suitable for harsh environments or occasions requiring electromagnetic shielding
3. Size and capacity
Select a junction box with sufficient space according to the number and diameter of the connecting cables
Reserve 20%-30% space for easy installation and maintenance
4. Sealing method
Silicone sealing ring (most common, cost-effective)
Glue seal (highest protection, but not easy to maintain)
Mechanical compression seal (metal junction box commonly used)
Other considerations
Temperature range: Choose products suitable for extreme local temperatures
UV protection: UV resistant materials should be selected for long-term sunlight exposure
Installation mode: wall-mounted, pole-mounted or buried
Inlet and outlet cable design: The number and specifications of waterproof connectors should match the cable
Certification standards: Check whether safety certifications such as UL and CE are available
Recommended type
1. Universal plastic waterproof box: suitable for most outdoor electrical connections, economical and practical
2. Metal waterproof junction box: suitable for industrial environments or occasions requiring electromagnetic shielding
3. Filling waterproof box: the highest level of protection, suitable for underwater or long-term wet environment
4. Separable waterproof box: convenient for later maintenance and inspection
The selection must consider the specific requirements of the actual application environment, and strike a balance between the level of protection and the cost.