NX Wedge Type Non Adjustable
Product Overview
The NX Wedge Type Non Adjustable 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. The body and wedge of the clamp are made of malleable cast iron, hot-dip galvanized. The split pin is made of stainless steel, and the remaining parts are hot-dip galvanized steel.
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 | Applicable Conductor Dia.(mm) | Main Dimensions(mm) | Nominal Failure Load(kN) | Reference Weight(kg) | |||
|---|---|---|---|---|---|---|---|
| C | M | L | R | ||||
| NX-1 | 6.6~7.8 | 18 | 16 | 150 | 6.0 | 45 | 1.19 |
| NX-2 | 9.0~11.0 | 20 | 18 | 180 | 7.3 | 88 | 1.76 |
| NX-3 | 13.0~14.0 | 25 | 24 | 195 | 8.0 | 143 | 3.20 |
| NX-4 | 15.0~16.0 | 30 | 27 | 220 | 8.0 | 164 | 4.60 |
Note: 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 |