Cable joint connections are divided into general wires and power cables. General wires may be manually twisted; power cables need crimping and sealing with professional fittings. Cut power and verify cable type prior to work.
🔌 General wires Cross solid copper wire ends in X-form, twist 2-3 turns, wrap each end 5-6 times and trim surplus. For stranded wires, tighten strands near insulation, interlock spread conductors and wind securely. Apply ≥2 insulation layers with heat-shrink tube or tape; use waterproof glue in damp conditions.
⚡ Power cables Strip outer sheath and armour. Crimp conductors with connector sleeves and polish burrs. Mount stress and insulation tubes, shrink from centre outwards. Wrap semi-conductive tape for continuous inner shielding. Reinstate outer sheath and perform air-tightness test.
⚠️ Notes Use special intermediate boxes for high-voltage cables. Avoid tension on joints. Apply multi-layer sealing against moisture. Leave access space for maintenance. Fit bimetallic transition sleeves for copper-aluminium connections to prevent galvanic corrosion.
