Product Introduction

NLL-1 Aluminum Strain Clamp (2-Bolt Bolted Tension Clamp)
Suitable for conductor cross-sections of 16–50 mm², this high-efficiency NLL-1 Aluminum Strain Clamp is specifically engineered for tension mounting and secure anchoring of small-gauge conductors on 10kV light-load lines. It serves as an outstanding, cost-effective solution for securing aluminum stranded wires (AAC) and steel-core aluminum stranded wires (ACSR) on rural feeder lines, township grids, and street lighting circuits.
Featuring a high-conductivity aluminum alloy body secured by a reliable two-bolt mechanical locking mechanism, it allows for fast, tool-free tightening installation without requiring heavy hydraulic crimping equipment. It represents the universally preferred, dependable hardware for small-scale distribution networks across Southeast Asia, Africa, and South America.

Technical Parameters

Review the verified engineering data below to find the exact 2-bolt Aluminum Strain Clamp sizes required for your light-load overhead distribution networks:

Model	Applicable stranded wire diameter (mm)	Main dimensions(mm)		Number of U-shaped screws	Nominal breaking load(kN)	Quality(kg)	Material
Model	Applicable stranded wire diameter (mm)	Main dimensions(mm)		Number of U-shaped screws	Nominal breaking load(kN)	Quality(kg)	Material
		M	C
NLL-1	8.0～12.0	16	18	2	40	1.5	Aluminum Alloy
NLL-2	11.0～16.0	16	18	2	60	1.8	Aluminum Alloy
NLL-3	15.0～20.0	16	27	3	70	2.5	Aluminum Alloy
NLL-4	19.0～24.0	18	30	3	90	3.5	Aluminum Alloy

Detailed technical parameters

NLL-1 Aluminum Strain Clamp

NLL-1 Conductor Range: Calibration-optimized for small-to-medium wire gauges, seamlessly accommodating an applicable stranded wire diameter range of 8.0–12.0 mm (perfectly fitting standard 16-50mm² ACSR wire specifications).

2-Bolt Structural Specs: Engineered with a compact profile featuring an M16 bolt size and a 14mm internal channel width (C value). Secured by 2 heavy-duty U-shaped screws to ensure highly uniform contact pressure.

Certified Tensile Stability: Delivers a rated nominal breaking load of 40 kN at a lightweight structural weight of 1.5 kg, providing excellent anti-slippage performance and structural integrity against outdoor wind vibrations without over-crushing the wire strands.

Product Features

Key Engineering Features of NLL-1 Aluminum Strain Clamps

Premium Extruded Aluminum Body: Cast as a single high-density piece from premium aluminum profiles, offering an exceptional balance of lightweight ergonomics, dense structural toughness, and outstanding current-carrying capacity.

Precision Contoured Cable Channel: Features precision-milled internal grooves designed to closely cradle 8-12mm conductors. The 2-bolt heavy clamping mechanism maximizes mechanical friction, ensuring an ultra-secure grip to completely prevent conductor slippage.

Heavy-Duty Weatherproof Coating: The aluminum body undergoes an advanced surface anodized passivation process, coupled with hot-dip galvanized (HDG) steel fasteners. This delivers superior resistance against heavy atmospheric moisture, rust, and salt-spray corrosion.

Utility-Approved Performance Standards: Fully compliant with international and national technical requirements for electric power hardware (GB/T 2314, GB/T 2315, DL/T 764). Thoroughly factory-tested for temperature rise and dynamic breaking load to ensure long-term safety in utility-grade grid distribution.