NXL-J Aluminum Alloy Wedge-Type Insulation Strain Clamp
The NXL-J aluminum alloy wedge-type insulation strain clamp is used to terminate and mechanically secure compatible overhead conductors at strain poles, angle poles and terminal structures. The clamp transfers the longitudinal conductor load to an insulator string, link fitting or other approved pole-line connection.
The product features a cast aluminum-alloy body with a wedge-type conductor-gripping structure. As conductor tension increases, the wedge assembly develops a corresponding clamping action inside the body. Depending on the selected model, a side-mounted bolted connector may be supplied for jumper or lead-wire connection.
The clamp is commonly used with overhead insulated aluminum conductors. Compatibility with bare AAC, AAAC, ACSR or other conductor constructions must be confirmed from the approved selection table before ordering.
Important: The photographs show more than one clamp size. Conductor diameter, insulation thickness, rated mechanical strength, connection-hole dimensions and side-connector configuration must be confirmed separately for each model.
Key Features
- Wedge-type conductor-gripping structure
- Cast aluminum-alloy main body
- Designed for overhead conductor dead-end and strain applications
- Two integral connection eyes for line-hardware assembly
- Side-mounted bolted jumper or lead-wire connector
- Reinforced body ribs for mechanical stability
- Mechanical installation without conductor compression tools
- Multiple sizes available for different conductor diameters
- Model, marking, connector and packaging customization available
Typical Technical Specifications
| Product Type | Wedge-Type Insulation Strain Clamp / Dead-End Clamp |
|---|---|
| Model Series | NXL-J Series, subject to approved drawing |
| Main Body Material | Aluminum alloy |
| Clamping Principle | Wedge locking |
| Conductor Type | Overhead insulated aluminum conductor; other conductor types subject to confirmation |
| Connection Structure | Integral eye connections with side-mounted bolted conductor connector |
| Fastener Material | Steel or stainless steel according to the selected model |
| Steel Hardware Finish | Zinc coated, subject to production specification |
| Installation Method | Mechanical wedge and bolted installation |
| Application | Strain pole, angle pole and terminal pole conductor termination |
| Rated Mechanical Strength | To be confirmed by model and mechanical test report |
| Reference Standard | IEC 61284 when specified by the project |
| Customization | Conductor range, connection holes, side connector, marking and packaging |
Final conductor range, dimensions, tightening torque and mechanical rating must be taken from the approved drawing and test report. Values from another manufacturer’s NXL-J selection table must not be used directly.
Wedge-Locking Structure
The conductor is held inside the clamp body by a matched wedge or keeper assembly. The internal profile must correspond to the conductor diameter and insulation construction. An incorrectly selected wedge can produce insufficient holding strength or damage the conductor covering.
Side-Mounted Conductor Connector
The side-mounted bolted component can be configured for jumper or lead-wire connection according to the product model. The compatible conductor material, conductor size, surface preparation and tightening torque must be confirmed before installation.
The product photograph alone does not confirm whether this connector is intended for a bare conductor, stripped insulated conductor or non-stripping installation.
Applications
- Overhead insulated distribution lines
- Conductor dead-end assemblies
- Strain and terminal poles
- Angle-pole conductor anchoring
- Distribution-line reconstruction projects
- Rural and urban overhead networks
Installation Guidance
- Confirm the conductor type, outside diameter and clamp model.
- Inspect the clamp body, wedge, connector and fasteners for damage.
- Install the conductor into the designated clamping channel.
- Position the matched wedge or keeper correctly inside the body.
- Connect the clamp eyes to the approved insulator or line-hardware assembly.
- Install the jumper or lead conductor in the side connector when required.
- Tighten all bolts to the specified torque using a calibrated tool.
- Check the conductor position, wedge engagement and hardware security.
Installation must be performed by qualified personnel on a de-energized and properly grounded line in accordance with the approved construction drawing and local safety procedures.
Quality Inspection
- Aluminum-alloy material inspection
- Body dimensions and connection-hole inspection
- Wedge and conductor-channel fit inspection
- Fastener and thread inspection
- Zinc-coating inspection for steel components when specified
- Slip-strength and mechanical-failure testing
- Assembly, marking and packaging inspection
Reference Standard
IEC 61284 specifies requirements and tests for overhead-line fittings. It is principally applicable to overhead lines above 45 kV but may also be applied to fittings for lower-voltage lines when required by the project specification.
Reference to IEC 61284 does not constitute certification. Compliance must be supported by test documentation for the exact clamp model, conductor and assembly.
Ordering Information
Please provide the following information when requesting a quotation:
- Required clamp model or dimensional drawing
- Conductor material and construction
- Conductor cross-sectional area
- Overall conductor and insulation diameter
- Required mechanical strength
- Connection-hole dimensions
- Jumper or lead-wire conductor size
- Required fastener material and coating
- Applicable test standard
- Quantity, marking and packaging requirements
Frequently Asked Questions
Is this an NLD-type strain clamp?
No. NLD clamps normally use a malleable-iron body and U-bolt construction. This product uses an aluminum-alloy wedge-type body and belongs to the NXL-J-style strain-clamp category.
Can it be used with insulated conductors?
Yes, when the selected clamp model and wedge profile are suitable for the conductor diameter and insulation construction.
Does the conductor insulation need to be removed?
This depends on the exact wedge and side-connector design. Do not advertise the product as a non-stripping clamp until the approved installation instructions confirm this function.
Can it be used with ACSR conductor?
Only when the product selection table specifically lists the required ACSR size. Conductor compatibility cannot be determined from the clamp appearance alone.
Is the clamp IEC certified?
IEC does not certify the product merely because IEC 61284 is referenced. Any compliance statement must be supported by a test report for the exact model.
