Installation of blue casing for cold-joint

The blue casing of a cold-joint is installed by sliding the pre-stretched cold-shrink tube over the prepared cable, positioning it correctly, and allowing it to contract to form a tight, insulated seal without heat.PreparationDe-energize and secure the cable: Ensure the cable is fully de-energized, locked out, and tagged before starting installation to prevent electrical hazards .Clean and strip the cable: Remove the outer sheath, semi-conductive screen, and insulation according to the joint manufacturer's specifications. Clean the conductor and insulation thoroughly to remove grease or debris .Prepare the screen and conductors: Wrap self-adhesive copper tapes around the cable ends, fold back screen wires, and secure them with adhesive tape to avoid sharp edges .Installation StepsSlide the cold-shrink assembly: Place the blue cold-shrink casing over one end of the cable, ensuring the end with the cable tie or reference mark goes on first .Position the connector: Fit the connector onto the conductors and check alignment using the provided template. Ensure semi-conductive screen edges are within the marked ranges .Tighten the connector: Follow the manufacturer's instructions to secure the connector to the conductors. Remove any grease from the crimped connector before final tightening .Release the cold-shrink tube: Gradually remove the inner support core (if present) to allow the silicone rubber casing to contract and form a tight seal around the cable and connector .Check alignment and seal: Verify that the casing fully covers the prepared cable ends and that there are no gaps or exposed conductors .Tools and SafetyUse gloves and protective equipment to avoid contact with sharp edges or chemical residues .Ensure the installation area is protected from rain, direct sunlight, or extreme temperatures to maintain material integrity .Common tools include cable preparation tools, adhesive tapes, cleaning solvents (ethyl alcohol or acetone), and a template for alignment .Additional TipsPerform installation at moderate temperatures; avoid foaming or sealing operations when the casing or environment exceeds 25°C .Follow the manufacturer's video or PDF instructions for specific cable types and voltage ratings, as procedures may vary slightly between brands like TE Raychem or 3M . By carefully following these steps, the blue cold-joint casing will provide a secure, insulated, and durable connection for medium- to high-voltage shielded cables.