Cast Resin Branch Joint

Cast Resin Branch Joint: Advanced Cable Connection Solutions for Low Voltage Networks

Xi'an OUKAMU Power Technology Co., Ltd. specializes in Cast Resin Branch Joint systems designed for modern low-voltage distribution networks. With over 150 national invention patents and 20 years of cable connection expertise, our products deliver IP68 waterproof protection, supporting main cables from 25~70mm and branch cables from 2.5~16mm. Our proprietary gel-filled insulation technology enables flexible on-site installation without cutting the main cable, preserving full current-carrying capacity while reducing installation costs by up to 40%. Successfully deployed across 10,000+ major infrastructure projects including Hong Kong–Zhuhai–Macao Bridge and multiple metro systems, OUKAMU branch joints ensure reliable, maintenance-free performance in underground, direct burial, and cable well applications.

What Is a Cast Resin Branch Joint?

The product is a unique cable connection device which makes T-branch connection in low voltage power distribution systems without interruption of the main cable conductor. Traditional methods for jointing include cutting and re-joining cables. Our approach use modern resin encapsulating technology to make secure branch connections without compromising the integrity of the main cable.

The system includes a high-strength waterproof enclosure, integrated connectors and a two-part polyurethane resin for complete electrical insulation and mechanical protection. This design method eliminates the need for pre-measurement or bespoke fabrication, allowing installation crews to create branch connections wherever they are needed during construction.

Our product technique is appropriate for PVC, XLPE, polyethene and armoured cables in 2-core to 5-core designs. The clear polycarbonate casing allows visual examination and is impact resistant for tough underground conditions.

Key Technical Features and Benefits

Superior Waterproof Protection

Its IP68 sealed design keeps water from entering and electrical leakage in cable wells, direct burial applications and other areas prone to dampness. The gel-filled insulation offers an absolute moisture barrier to all connecting points for long term operating stability even in flooded environments.

Flexible Installation Without Main Cable Cutting

Branches can be installed anywhere along the main cable route by installation teams without cutting the conductor. This uncut design preserves the cable’s original current carrying capacity and mechanical strength, but reduces probable failure points by 60% compared to typical cut-and-splice methods.

Time and Cost Saving

Installation on site takes about 30 minutes with minimal tools. No specific equipment or training needed. Cable cutting, length reservation and difficult splicing procedures are eliminated, resulting in significant reduction in labour costs and acceleration in project completion times.

Fire-Resistant Characteristics

Our fire resistant branch joint designs improve safety for vital infrastructures. They ensure electrical continuity in fire situations and meet demanding fire safety requirements for tunnels, high-rise structures and public facilities.

Extensive Cable Compatibility

Compatible with single core and multi-core polymeric cables, paper insulated cables and steel wire armoured (SWA) cables. The integrated connector system can handle a range of conductor materials, including copper and aluminium, and stranded or solid types.

Parameters

Installation Applications

Underground Cable Networks

Ideal for municipal power distribution systems where direct burial installation of Cast Resin Branch Joint requires long-term reliability. The sealed resin construction prevents soil moisture penetration and protects against mechanical stress from ground settlement.

Industrial and Commercial Buildings

Factory complexes, shopping centers, and office buildings benefit from the space-saving design that optimizes cable routing in confined spaces. The maintenance-free operation reduces lifecycle costs for facility managers.

Residential Developments

Multi-unit residential projects require flexible branching for individual unit connections. Our solution simplifies distribution panel connections while maintaining aesthetic standards through concealed installation.

Transportation Infrastructure

Metro stations, tunnels, and highway lighting systems demand robust connections that withstand vibration and temperature fluctuations. Successfully proven in Nantong Metro Line 2 and multiple high-speed railway projects.

Public Facilities

Hospitals, sports centers, and educational institutions require reliable power distribution with minimal disruption during installation. The quick installation process reduces downtime and construction impact.

Why Choose OUKAMU Branch Joints?

History of Success

More than 10,000 successful project installations have proven the durability of our product in difficult applications, including key infrastructure projects such as Zhengzhou–Wanzhou High-Speed Railway, Yinchuan–Xi'an High-Speed Railway and Shaanxi Olympic Sports Center.

Patent Protected Innovation

Our cable branch connection method is protected by 20-year invention patents and is a world pioneering breakthrough that provides true performance improvements not seen in traditional alternatives.

Technical Support

Our engineering team will offer specification consulting, installation guidance and post-installation support throughout the lifecycle of your project. We assist with electrical designers and contractors to improve distribution system designs.

Quality Manufacturing Standards

With ISO-certified production facilities, each unit is guarantyd to be of uniform quality. Products are subjected to rigorous testing procedures before leaving our production to confirm electrical performance, mechanical strength and resilience to the environment.

FAQ

Q: How does a product differ from traditional cable joints?

A: Traditional joints require cutting the main cable and splicing all conductors, which reduces current capacity and creates potential failure points. Our product connects branch cables without interrupting the main conductor, preserving full electrical performance while simplifying installation.

Q: Can branch joints be installed in flooded cable wells?

A: Yes, our IP68 waterproof rating ensures reliable operation even when fully submerged. The gel-filled resin creates a complete moisture barrier around all electrical connections, preventing water ingress and corrosion.

Q: What cable types are compatible with these branch joints?

A: Our products work with PVC-insulated cables, XLPE cables, armoured SWA cables, and paper-insulated cables in both single-core and multi-core configurations from 2.5mm² to 70mm² conductor sizes.

Q: Do I need special tools for installation?

A: No specialized equipment is required. Basic hand tools and standard cable preparation implements are sufficient. The snap-close housing design simplifies assembly, and the pre-integrated connectors eliminate complex wiring procedures.

Q: How long do the products last?

A: With proper installation, our joints provide 30+ years of maintenance-free service. The resin encapsulation protects against environmental degradation, and the uncut main cable design eliminates common failure mechanisms associated with traditional splices.

Q: Are these joints suitable for fire-rated applications?

A: Yes, we offer fire-resistant models specifically engineered for enhanced fire protection. These units maintain circuit integrity during fire events and comply with fire safety standards for critical infrastructure installations.

Contact Us for Expert Support