Underwater Junction Box
Underwater Junction Box – IP68 Waterproof Cable Connection Solution
Xi'an OUKAMU Power Technology Co., Ltd. presents the Underwater Junction Box Model OKJX-240, engineered with 20 years of specialized expertise in branch cable connector technology. This enterprise-grade solution features IP68 waterproof certification and supports main cable conductor cross-sectional areas from 70~240mm². Built with gel-filled insulation and waterproof double safety protection, it offers concealed installation capability in wells or direct buried soil applications. The flexible installation location design combined with low overall cost delivers exceptional value for infrastructure projects requiring reliable underwater or buried cable connections.
Technical Specifications of Underwater Junction Box
| Parameter | Specification |
|---|---|
| Model | OKJX-240 |
| Protection Rating | IP68 Waterproof |
| Main Cable Cross-Sectional Area | 70~240mm² |
| Insulation Type | Gel-filled insulation |
| Safety Protection | Double layer waterproof system |
| Installation Method | Concealed in wells or direct buried |
| Installation Flexibility | Multiple location options |
| Material | High-strength engineering plastic |
| Cost Performance | High efficiency, low overall cost |
Product Selection
| Product Name | Model | Specification (Conductor Cross-Sectional Area, mm²) | Technical Specifications | ||
| Rated Voltage (kV) | Current Carrying Capacity (A) | Dimensions L×W×H (mm) | |||
| Jointing Box | OKJX-25 | 4~25 | 0.6/1 | 120 | 485×170×90 |
| Jointing Box | OKJX-50 | 10~50 | 0.6/1 | 190 | 540×190×100 |
| Jointing Box | OKJX-95 | 25~95 | 0.6/1 | 290 | 590×215×115 |
| Jointing Box | OKJX-150 | 50~150 | 0.6/1 | 395 | 640×240×135 |
| Jointing Box | OKJX-240 | 70~240 | 0.6/1 | 540 | 700×270×160 |
Why Choose Our Waterproof Junction System?
Built for Extreme Underwater Conditions
When your project demands reliable cable connections in submerged or buried environments, you need protection that goes beyond standard solutions. Our junction box system delivers true IP68-rated performance. This means complete protection against continuous immersion and total dust exclusion.
The gel-filled insulation technology creates a double barrier against water penetration. Even in flooded wells or saturated soil conditions, your electrical connections remain secure and operational.
Engineering Excellence From Two Decades of Experience
Since 2007, we've focused exclusively on cable connection innovation. Our team holds over 150 national invention patents in cable branch technology. This isn't generic manufacturing—it's specialized engineering backed by proprietary systems protected for 20 years.
The OKJX-240 model incorporates breakthrough innovations in cable T-connection design. You benefit from technology proven across more than 10,000 major infrastructure projects, including the Hong Kong–Zhuhai–Macao Bridge and multiple high-speed railway systems throughout China.
Maximum Compatibility, Minimum Installation Time
Your installation teams face tight deadlines and varying site conditions. Our modular design eliminates complex tooling requirements and reduces on-site installation time dramatically.
The junction box accommodates conductor cross-sectional areas from 70mm² to 240mm², giving you flexibility for different cable specifications within a single product line. Conductors connect securely within terminal slots, ensuring reliable mechanical and electrical performance without specialized expertise.
Whether you're working on metro systems, municipal infrastructure, or industrial facilities, the adaptable configuration meets diverse application needs efficiently.
Key Product Advantages
Superior Sealing and Environmental Resistance
Underwater Junction Box The high-performance sealing structure combines with resin encapsulation technology to create an impenetrable barrier. Moisture, dust, contaminants—none can compromise your electrical connections.
This robust construction resists corrosion, UV radiation, and material aging. Your junction box maintains integrity through years of exposure to high-humidity environments, temperature fluctuations, and aggressive soil conditions.
Reduced Lifecycle Costs
Initial installation represents just one cost factor. Long-term operation and maintenance expenses often exceed upfront investment. Our design philosophy addresses both.
Simple installation procedures cut labor costs immediately. The reliable connection system minimizes service calls and troubleshooting. When inspection or network expansion becomes necessary, straightforward access points and clear internal layout reduce maintenance time significantly.
You'll appreciate the cost efficiency across the complete project lifecycle—from initial deployment through decades of reliable service.
Mechanical and Electrical Performance
The enclosure uses high-strength engineering materials engineered for exceptional mechanical strength and impact resistance. This isn't fragile equipment vulnerable to installation damage or environmental stress.
Excellent electrical insulation properties protect against fault conditions and ensure safe operation. The fully sealed design maintains these protective characteristics even when continuously submerged.
Applications and Installation Flexibility
Versatile Deployment Options
Your project site dictates installation requirements. Our underwater cable junction solution adapts to your conditions rather than forcing you to modify your approach.
Concealed Well Installation: Mount the junction box inside access wells for protected yet serviceable connections. The compact design fits standard well dimensions while providing generous working clearance.
Direct Burial Applications: When surface access isn't practical, direct burial installation provides permanent cable connection points without visible infrastructure. The IP68 rating ensures reliable performance despite continuous soil moisture exposure.
Flexible Location Placement: Cable routing rarely follows ideal paths. Junction placement flexibility helps you optimize layouts around obstacles, property boundaries, and future expansion zones.
Suitable Project Types
- Municipal water and wastewater treatment facilities
- Subway and metro electrical distribution systems
- Highway lighting and communication networks
- Port and marina electrical infrastructure
- Industrial facilities with outdoor cable distribution
- Agricultural irrigation control systems
- Landscape and fountain electrical connections
Quality Backed by Innovation Leadership
Xi'an OUKAMU Power Technology Co., Ltd. doesn't simply manufacture components—we advance connection technology through continuous research and development. Our multiple international registered trademarks and proprietary cable branch connection systems represent genuine innovation leadership.
The underwater junction box you receive incorporates decades of engineering refinement and real-world testing under the most demanding conditions. Projects spanning high-speed railways, Olympic venues, and critical infrastructure depend on the same technology protecting your cable connections.
This track record of reliability in high-profile applications gives you confidence in performance when your project reputation depends on it.
Frequently Asked Questions
Q: What does IP68 protection actually mean for underwater use?
A: IP68 represents the highest standard protection rating. The "6" indicates complete dust-tightness with zero particle ingress. The "8" certifies protection against continuous submersion beyond 1 meter depth. Your junction box can operate reliably even when permanently underwater or in saturated soil.
Q: Can I use this junction box for both power and control cables?
A: Yes. The OKJX-240 model accommodates various cable types within the 70~240mm² conductor range. You can create branch connections for power distribution, control circuits, or mixed applications depending on your system design.
Q: How long does typical installation take?
A: Installation time varies by site conditions and cable complexity. However, the modular design typically reduces installation time by 40-60% compared to traditional junction methods. Most single-junction installations complete within 2-3 hours, including cable preparation and testing.
Q: What maintenance schedule do you recommend?
A: The sealed design minimizes maintenance requirements. For critical applications, we suggest visual inspection during regular facility maintenance intervals. Internal inspection is typically only necessary during system modifications or if monitoring indicates connection issues—which rarely occur with proper installation.
Q: Does the gel-filled insulation require replacement or maintenance?
A: No. The gel-filled insulation is a permanent protection system that doesn't degrade, dry out, or require replenishment. Once properly installed, the double waterproof protection maintains effectiveness throughout the product's service life.
Q: Can your junction box withstand freeze-thaw cycles in buried applications?
A: Yes. The high-strength engineering materials resist damage from thermal cycling. The flexible gel insulation accommodates expansion and contraction without compromising seal integrity, making it suitable for installations in regions experiencing seasonal freezing.
Q: What cable types are compatible with this junction system?
A: The system works with standard power cables including XLPE insulated cables, PVC cables, and similar types within the specified conductor size range. Contact our technical team for specific cable type compatibility verification for your application.
Q: How does your product compare to imported alternatives?
A: Our 20 years of specialized focus on branch cable connector technology, combined with over 150 patents, delivers performance matching or exceeding imported products at significantly lower cost. Thousands of major infrastructure projects validate reliability while domestic manufacturing ensures faster delivery and responsive support.
Contact Us
Underwater Junction Box Ready to specify reliable underwater cable connections for your project? Our engineering team can help you select the optimal configuration.
Email: info@okmbranchcable.com
