NXJ Bundled Insulation Strain Clamp
Product Overview
The NXJ Bundled Insulation Strain Clamp is a specialized strain clamp designed for terminal fixing and tensioning of bundled insulated conductors on low-voltage overhead lines. Widely recognized in the industry under alternative names including dead-end clamp, tensile clamp, end clamp, anchor clamp, this product serves as a critical component in 1 kV LV bundled insulated conductors systems. NXJ bundled insulation strain clamp is suitable for the terminal of 1kV bundled insulation conductors, serving to fix and tension the insulation wires. Easy to install, no need to strip the insulation layer. High-strength reinforced nylon material is used as the inner wedge, which does not damage the insulation performance, providing stable and reliable grip force.
Advantages
- “No insulation stripping required” — wedge core grips conductor directly through insulation layer, saving installation time
- “Non-magnetic aluminum body” — cast aluminum alloy construction eliminates magnetic hysteresis loss, improving energy efficiency
- “Reliable grip force” — reinforced nylon inner wedge provides stable, damage-free clamping without compromising conductor insulation
- “Weather-resistant design” — engineering plastic and aluminum components withstand UV exposure, temperature cycling, and outdoor conditions
- “Quick bolt-on installation” — tie-rod or tie-plate configurations allow fast field assembly without special tools
Technical Parameters
| Model | Conductor Adapted by Wedge Core (mm²) | Description | Product Illustration |
|---|---|---|---|
| NXJ4-1A | 4×16~50 | Tie-rod type, aluminum alloy body. | |
| NXJ4-2A | 4×70~120 | ||
| NXJ4-1B | 4×25~50 | Tie-plate type, body is weather-resistant engineering plastic. | |
| NXJ4-2B | 4×70~120 | ||
| NJX-4-10/25 | 4×10~25 | Tie-rod type, aluminum alloy body. | |
| NJX-4-35/50 | 4×35~50 | ||
| NJX-2-10/25 | 2×10~25 | ||
| NJX-2-35/50 | 2×35~50 | ||
| NJX-4-70/95 | 4×70~95 | Aluminum alloy body, engineering plastic inner wedge. | |
| NJX-4-120 | 4×120 | ||
| NJX-2-70/95 | 2×70~95 | ||
| NJX-2-120 | 2×120 |
Note: Manufactured from high-strength cast aluminum alloy, no magnetic hysteresis loss. The wedge core uses high-strength reinforced nylon material, with good insulation performance. Easy to install, no need to strip the insulation layer. ◆ Does not damage insulation performance, grip force is stable and reliable. Dimensions may vary slightly based on manufacturing tolerances. Contact our engineering team for custom sizes or special requirements.
Material & Manufacturing
- Material: high-strength cast aluminum alloy
- Secondary components: reinforced nylon wedge core
- Surface treatment: Hot-dip galvanizing in accordance with ISO 1461 / ASTM A153 / IEC 61589, minimum zinc coating thickness 65 μm
- Manufacturing process: Precision forging, casting, or CNC machining of critical dimensions, followed by full galvanizing immersion. Dimensional accuracy controlled within ±0.5 mm tolerance on mounting interfaces
- Quality assurance: Every batch undergoes dimensional inspection, galvanizing thickness testing (magnetic or gravimetric method per ISO 2178), and visual surface examination. Mill test certificates (MTC) available upon request
Application Scope
- Terminal fixing and tensioning of bundled insulated conductors on low-voltage overhead lines
- Rural and urban LV distribution networks using bundled insulated cables (ABC cables)
- Temporary construction power lines and pole-to-pole connections
- Street lighting and service drop installations on insulated bundled conductors
Frequently Asked Questions
Q: Can NXJ clamps be used on bare conductors? A: NXJ clamps are specifically designed for bundled insulated conductors. For bare conductors, consider NLL or NXLH series bolt-type strain clamps.
Q: What conductor sizes are supported? A: NXJ series covers 2-core and 4-core configurations from 10 mm² to 120 mm² cross-section per core. Refer to the technical parameter table for exact compatibility.
Q: Is the wedge core replaceable? A: The reinforced nylon wedge core is factory-matched to each model. Contact us for replacement wedge cores or custom configurations.
Industry Standards & Compliance
| Standard | Scope |
|---|---|
| IEC 61589 | Galvanizing requirements for overhead line hardware |
| ISO 1461 | Hot-dip galvanized coatings on iron and steel articles |
| ASTM A153 | Zinc coating (hot-dip) on iron and steel hardware |
| GB/T 2314 | General requirements for overhead line fittings |
| GB/T 2317 | Mechanical testing methods for overhead line hardware |
| DL/T 765.2 | Suspension and strain hardware for overhead power lines |