ABX-S Type Underground Loop Box (Plastic Enclosure)
ABX-S type loop box features a lightweight door opening mechanism and a full plastic arc appearance with an elegant and refined finish. Expansion positions can be reserved and filled with matching blank cards without affecting the overall appearance. All installation screws are concealed — not exposed externally — providing a clean, vandal-resistant exterior surface.
The box adopts a three-layer structure comprising the front panel, circuit breaker mounting rack, and bottom box, which significantly simplifies installation and facilitates convenient maintenance access and internal wiring. The wiring interior is spacious with ample room for cable termination and routing. Double ring knock-out holes at the base accommodate different cable diameters and entry configurations, providing flexibility to meet different user installation requirements. Meticulous surface protection design ensures long-term weather resistance and UV stability.
The practical application range is extremely wide. ABX-S series lighting and power terminal distribution boxes are manufactured for lighting and power distribution systems in new residential buildings, industrial plants, shopping malls, factories, mines, office buildings, and other facilities across industry, commercial, construction, utility, and power supply sectors.
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) — UV-stabilized |
| Degree of Protection | IP54 / IP65 (optional) |
| Door Opening | Lightweight upward-opening with concealed hinge |
| Internal Structure | Three-layer: Panel + Breaker rack + Bottom box |
| Expansion Slots | Pre-formed knock-outs with matching blank card fillers |
| Cable Entry Knock-Outs | Double ring design — compatible with multiple cable diameters |
| Grounding | Integrated grounding terminal bar |
| Installation | Wall-mounted (indoor or sheltered outdoor) |
| Standards | GB/T 7251, IEC 61439 |
Key Features
- Lightweight Plastic Construction: Full plastic arc housing manufactured from engineering-grade PC/ABS alloy with UV stabilization — providing excellent weather resistance, corrosion immunity, electrical insulation, and impact strength while remaining lighter than equivalent steel enclosures for easier handling and installation
- Concealed Screw Design: All fixing screws are hidden from external view, providing a smooth, clean exterior surface that resists vandalism, tampering, and corrosion — no exposed ferrous fasteners means no rust staining or degradation over years of outdoor service
- Expandable Modular Configuration: Pre-formed expansion positions on the mounting base can be opened as required and filled with matching blank cards — allowing future circuit additions without enclosure modification while maintaining appearance and protection integrity during the initial installation phase
- Three-Layer Structured Assembly: The panel, circuit breaker mounting bracket, and base box are independently separable — the component rack can be pre-wired outside the enclosure and installed as a complete sub-assembly, significantly reducing on-site installation labor and improving build quality consistency
- Double Ring Knock-Out System: Each cable entry position features concentric knock-out rings for standard metric cable diameters — the inner ring can be removed for smaller cables, or both rings for larger cables, providing installation flexibility while maintaining enclosure integrity for unused entries
- IP54 Weatherproof Protection: Fully gasketed enclosure construction provides protection against dust ingress and water splashes from any direction — suitable for indoor installation, sheltered outdoor locations, and covered distribution areas where occasional exposure to moisture may occur
- Integrated Grounding Bus: Pre-installed copper grounding terminal bar with multiple connection points provides a centralized earthing point for all cable armor/sheath terminations and metallic component bonding — simplifying inspection testing and ensuring compliance with safety earthing requirements
Applications
- Residential buildings — apartment and house lighting and power distribution
- Industrial plants — machine power and workshop lighting distribution
- Shopping malls and commercial centers — lighting and socket outlet distribution
- Office buildings — floor-level lighting and power terminal distribution
- Mines and industrial facilities — general power distribution
- Commercial retail outlets — small commercial power distribution
- Utility power supply — terminal distribution for end-user connections