ABX-T Type Underground Loop Box
ABX-T type loop box is an underground cable distribution and branching enclosure designed for low voltage power distribution networks. It features a light grey box body with standard DIN rails pre-installed inside, a grounding terminal block, and grounding screws — ensuring all module switches are mounted at the same height for a uniform and professional appearance.
The lightweight door opens 180° upward with a fully plastic arc appearance, providing elegant aesthetics and unobstructed access for cable termination and maintenance. The mounting screws are concealed — not exposed externally — delivering a clean finish while maintaining structural integrity. The spacious wiring interior provides ample room for cable bending radius and termination, and the meticulous surface protection design ensures long service life in outdoor underground environments.
Technical Specifications
| Item | Specification |
|---|---|
| Rated Voltage | 400V AC |
| Rated Frequency | 50Hz / 60Hz |
| Rated Current | Up to 630A |
| Rated Short-time Withstand Current (Icw) | 15kA / 20kA (1s) |
| Enclosure Material | Engineering plastic (PC/ABS alloy) or Stainless steel |
| Door Opening | 180° upward, lightweight with concealed hinge |
| Internal Rail | Standard DIN rail (35mm) — pre-installed |
| Grounding | Integrated grounding terminal block + grounding screws |
| Protection Degree | IP54 / IP65 (optional) |
| Cable Entry | Bottom entry with knock-out holes |
| Installation Type | Underground pit / Ground-mounted |
| Surface Protection | UV-stabilized, anti-corrosion coating |
| Standards | IEC 61439, GB/T 7251 |
Key Features
- Lightweight Arc Design: Fully plastic arc appearance with concealed mounting screws provides an elegant, modern look while eliminating exposed hardware that could corrode in underground environments — the smoothly contoured surface also prevents water pooling and debris accumulation
- 180° Upward-Opening Door: The lightweight door hinges open a full 180°, locking securely in the open position to provide unobstructed access to all internal components — removing the need to hold the door open during cable termination or maintenance work
- Concealed Screw Design: All mounting and fixing screws are concealed from external view, providing a clean, vandal-resistant exterior surface while preventing unauthorized tampering with internal components
- Standard DIN Rail Configuration: Pre-installed 35mm DIN rails ensure all module switches and breakers are mounted at a consistent height for a uniform appearance and simplified wiring — compatible with standard DIN-rail mounted MCBs, RCCBs, RCBOs, and terminal blocks
- Spacious Wiring Interior: Generous internal dimensions provide ample space for cable bending radius compliance, multiple cable entries, and convenient tool access to termination points — reducing installation time and ensuring reliable terminations
- Integrated Grounding System: Pre-installed grounding terminal block and grounding screws provide a centralized grounding point for all metallic components and cable armor/sheath bonding, ensuring compliance with safety earthing requirements and facilitating inspection testing
- Durable Surface Protection: The enclosure is treated with UV-stabilized, anti-corrosion coating providing extended service life in harsh outdoor and underground environments — resistant to moisture, salt spray, soil chemicals, and temperature cycling
Applications
- Underground cable branching and distribution in urban power networks
- Residential community underground cable termination points
- Street lighting and public area power distribution
- Industrial plant outdoor power distribution
- Infrastructure — road lighting and tunnel power supply
- Temporary construction site underground distribution