Dongguan Liangrui Electronics Co., Ltd. Founded in October 2011 and located in Hengli Town, Dongguan—a region with convenient transportation—today I’d like to share with you some tips on how to make the right choice. IP68 Waterproof cast aluminum junction box.

First and foremost is the selection of materials: Currently, waterproof junction boxes are primarily used in industrial sites and outdoor environments with relatively harsh conditions. From the perspective of product safety performance, we should take into account the material’s impact resistance, static load strength, insulation properties, non-toxicity, aging resistance, corrosion resistance, and flame-retardant performance.

2. Structural Design: The waterproof junction box should take into account overall strength, aesthetic appeal, ease of fabrication, ease of installation, and recyclability. Currently, mainstream international manufacturers produce waterproof junction boxes that contain no metal components whatsoever, thereby simplifying the product’s recycling process. However, most domestic manufacturers in China currently use different materials with poor resistance to mold and decay. Typically, these manufacturers install brass inserts in the mounting sockets inside the waterproof junction boxes to enhance structural integrity. As a result, the material recycling process becomes more time-consuming and costly.

3. Wall Thickness: When designing a product and considering its overall cost, it is advisable to minimize the wall thickness as much as possible while still meeting the product’s requirements for impact resistance and resistance to deformation. In internationally standardized waterproof junction boxes, the wall thickness of products made from ABS and PC materials typically ranges from 2.5 to 3.5 mm; for glass-fiber-reinforced polyester, the wall thickness generally falls between 5 and 6.5 mm; and for die-cast aluminum products, the wall thickness usually ranges from 2.5 to 6 mm. The material wall thickness, when designed, should adequately accommodate the installation requirements of most components and accessories.

4. Selection of sealing gasket materials: For waterproof junction box products, commonly used sealing gasket materials include PUR, EPDM, Neoprene, and Silicone. When selecting a sealing gasket, consider the temperature range, tensile strength, elongation at break, hardness, density, compression set, and chemical resistance.

5. Material for the screws securing the waterproof connector cover: The bolts are a critical component when the cover of the waterproof junction box is joined to the base. The selection of bolt material is also extremely important. Commonly used materials include PA (nylon) or PA alloys; stainless steel self-tapping screws can also be used. When designing the cover screws, structural strength should be taken into account. Since different users may have varying usage patterns and thus different requirements—for example, installation using an electric screwdriver or manual installation—torque specifications for the screws must be considered during the design phase.

All of our company’s products have been certified to meet the safety standards of developed countries in Europe and the U.S., including UL, CUL, TUV/GS, CE, SAA, and PSE. In response to global new energy-saving requirements, all our products comply with energy-efficiency standards such as ERP, NRCAN, DOE, CEC, and MEPS VI. We place great emphasis on environmental protection, and all our products also meet stringent environmental regulations like RoHS, REACH, and California Proposition 65. Our company commits that every single product leaving our facility undergoes ICT testing, PCBA electrical testing, assembled-unit electrical testing, high-voltage testing, aging tests, and pre-packaging inspections—ensuring that we deliver to our customers power products that are safe, energy-efficient, environmentally friendly, and highly reliable.

Finally, we warmly welcome both new and existing customers to call or leave a message for inquiries!!!!