LANGLI PVC Request a Catalog LANGLI PVC Request a Catalog Explore our top-tier export range engineered for seamless integration with 3x3 junction boxes, surface trunking, and high-density electrical conduit runs.
In modern electrical installation topology, the 3x3 junction box (86mm x 86mm standard footprint) represents the fundamental node for power distribution, signal routing, and safety containment in high-density installations.
Manufactured from high-impact Unplasticized Polyvinyl Chloride (PVC-U), our 3x3 junction boxes exhibit superior dielectric strength (>35 kV/mm) and zero moisture absorption, preventing micro-arcing and structural degradation over extended lifecycle spans.
Utilizing high-precision multi-cavity injection molds engineered in Foshan, China, our boxes maintain strict wall-thickness uniformity (±0.05mm) and standardized 60.3mm fixing screw center distances, matching global BS 4607 and IEC 60670 requirements.
Engineered with custom self-extinguishing flame-retardant additives. Rated UL 94 V-0, our junction boxes self-extinguish within 10 seconds of flame removal, resisting thermal deformation up to 85°C operational threshold environments.
Tailored non-conductive enclosure solutions optimized for commercial megastructures, industrial automation hubs, telecom data networks, and residential smart grids.
Flush-mount 3x3 junction boxes provide flush electrical wiring access for power sockets, lighting controls, and IoT environmental sensors. Compatible with surface PVC trunking profiles from 10x10mm to 100x50mm.
Corrosion-proof, chemical-resistant PVC surface junction boxes protect branch connections against aggressive atmospheric agents, acids, and alkalis commonly present in chemical plants and manufacturing floors.
Designed with smooth internal radii to prevent structural stress on fiber optic channels and low-voltage Cat6A cabling. Pre-formed knockouts ensure effortless, tool-free entry for rapid cabling deployments.
Our Foshan toolroom offers end-to-end OEM tooling development. From custom wall thicknesses to precise brass screw insert integration (M3.5 / M4 standard), we deliver tailored 3x3 enclosures matching your exact project engineering drawings within 30 days.
Foshan Shunde Langli Hardware Electrical PVC Co., Ltd. combines three decades of polymer moulding expertise with automated Industry 4.0 infrastructure.
We source virgin PVC resins direct from tier-one chemical vendors, blending flame retardants, UV stabilizers, and impact modifiers in-house to maintain 100% compound purity and batch-to-batch color consistency.
Equipped with state-of-the-art robotic pick-and-place arms, our injection moulding hall operates 24/7, enabling scalable production capacities capable of fulfilling high-volume 40ft container orders within 15–25 days.
Every lot undergoes stringent quality audits: low-temperature impact drop testing (-5°C), vertical glow-wire burn tests (960°C), wall thickness ultrasonic measuring, and thread torque tensile evaluations.
Comprehensive engineering matrix for electrical specifiers, project managers, and OEM procurement officers.
| Parameter / Dimension | Standard Specification | OEM Option Range | Compliance Reference |
|---|---|---|---|
| Nominal Size Footprint | 3" x 3" (86mm x 86mm Square) | Deep box (35mm, 47mm), Shallow box (16mm, 25mm) | BS 4607 / BS 5733 / IEC 60670 |
| Screw Center Distance | 60.3 mm (Standard Fixing) | Adjustable lug options available | BS EN 61386-1 |
| Thread Inserts | M3.5 Solid Brass Inserts | Direct self-tapping plastic or M4 steel insert | ISO Metric Screw Threads |
| Material Formulation | Rigid Unplasticized PVC (PVC-U) | Halogen-Free (LSZH), High Impact Modified | RoHS 2.0 / REACH Compliant |
| Knockout Entries | 4-Way / Multi-directional (20mm & 25mm) | Custom knockout positions & concentric steps | IP20 to IP66 (With Gaskets) |
| Flame Retardancy | UL 94 V-0 (Self-Extinguishing) | Glow Wire Test 960°C IEC 60695-2-11 | CE Mark / Fire Safety Codes |
| Standard Colors | Signal White (RAL 9003) | Ivory, Jet Black (RAL 9005), Slate Grey | Custom Pantone Matching |
Our engineering design ensures seamless compliance across major international export markets, satisfying strict customs inspections and regional tender specifications.
Fully compliant with BS 4607 and BS EN 61386 conduit systems. Extensively supplied to electrical distributors in the United Kingdom, UAE, Saudi Arabia (SASO certified), Oman, Qatar, and Malaysia.
Carries official CE conformity documentation and RoHS heavy metal test verifications. Meets Directive 2011/65/EU guidelines restricting lead, cadmium, mercury, and polybrominated biphenyls.
Tailored wall thicknesses and knock-out configurations engineered for imperial conduit sizes (1/2" to 1"), widely deployed in Caribbean and South American infrastructure projects.
Streamlining the procurement lifecycle for international wholesalers, brand owners, and EPC contractors.
Submit target dimensions, color requirements, standard expectations, and volume forecast. Our engineering desk returns an itemized landed cost quote within 24 hours.
For custom OEM designs, 3D prototypes are generated within 5 business days, followed by rapid multi-cavity injection steel tooling within 25–30 days.
Upon sample approval, high-speed automated production runs under ISO 9001:2015 standards, maintaining strict quality checks across all production shifts.
We mix 3x3 junction boxes, conduit fittings, switch boxes, and trunking into unified 20ft/40ft HQ loads to maximize volumetric efficiency and minimize freight costs.
Pioneering next-generation polymer technologies and smart installation architectures.
Developing bio-attributed PVC polymers utilizing bio-naphtha feedstocks, reducing embodied carbon footprints by up to 40% without compromising mechanical impact resistance or flame retardancy standards.
Integrating pre-molded clips and structural internal channels designed for snap-in IoT wireless telemetry modules, micro-circuit breakers, and ambient temperature monitor sensors.
Engineering tool-free push-lock lid systems and click-fit conduit sleeve adapters that accelerate jobsite electrical box installation times by up to 35% for high-density contractor teams.
Explore our full ecosystem of high-grade PVC cable ducts, circular 4-way boxes, and heavy-duty wireways built for demanding export markets.
In-depth answers from our engineering and export trade team regarding 3x3 junction box manufacturing, material standards, and OEM customization.
