Our JBL, JBT and JB-TL series special-shaped parallel groove clamps are mainstream overhead line power fittings, engineered for non-load-bearing conductor splicing and branch connection on overhead power transmission lines. When paired with matching insulating covers, the clamps deliver reliable insulation shielding, lowering short-circuit and leakage risks for outdoor wiring projects. We stock aluminum, copper and copper-aluminum bimetal variants to fit dissimilar metal wire splicing, effectively mitigating galvanic corrosion between copper and aluminum cables.

Core Advantages

• Corrosion-Resistant Raw Material — High anti-oxidation aluminum alloy as standard; copper-aluminum transition models eliminate electrochemical corrosion at copper–aluminum junctions, significantly extending outdoor service life.
• Anti-Drop Integrated Structure — One-piece connected hardware prevents bolt and washer detachment during field installation, reducing rework risk.
• Anti-Creep Arc Clamping Design — Large curved contact surfaces distribute clamping force evenly to suppress conductor creep deformation and prevent loosening from long-term wire stress and temperature swings.
• Low-Resistance Tooth-Shaped Contact — Precision-machined tooth profiles reduce contact resistance for stable electrical conductivity and less heat buildup at wiring joints.

Certified Performance

• Power frequency withstand voltage: ≥18kV, zero dielectric breakdown in 1-minute testing
• Insulation resistance: above 1.0×10¹² Ω
• Maintains dependable performance after 1008 hours of artificial accelerated climate aging

Applications Overhead low-voltage distribution line tap-off and cable jointing; power grid upgrade and rural electrification; street lamp, monitoring and landscape lighting branch wiring; temporary power supply; copper-to-aluminum transition connections.

Custom specifications and insulating cover sets are available. Contact us for details.