01    Construction preparation
(1) The production of cable intermediate joints should be carried out by trained personnel familiar with the process (who must hold a certificate).

(2) The construction personnel are familiar with the drawings and installation process, and master the production and installation dimensions and process requirements.

(3) Confirm that the cable phase is correct.

(4) Keep the environment clean, avoid contaminating the insulation surface, and prevent dust and debris from falling on the insulation surface. If necessary, a joint shed should be built.

(5) Strictly control the relative humidity of the joint area environment, generally requiring 70% or less; If the relative humidity exceeds 70%, dehumidification treatment should be carried out before production; If specified in the installation manual, follow the instructions.

(6) Identify the location of the power source and connect the temporary power source.
(7) The construction site should have sufficient lighting and fire-fighting equipment.

(8) Prepare the tools and equipment. Tools that may come into contact with cable conductors and insulation during construction, such as cutting tools for stripping semi conductive shields, calipers, steel rulers, clamps, and molds, should be cleaned and kept dry.

(9) Check the heating and straightening equipment, and promptly handle any abnormalities.

(10) Consumable materials are complete.

(11) Cleaning agents are generally anhydrous alcohol and acetone. If there are special requirements for the drawing process, follow the drawing process requirements.

(12) According to the packing list of the attached product, check whether the components are complete, and inspect for any damage or other defects. Conduct a key inspection of the attached components: the outer packaging seal should be intact, the inner and outer surfaces of the stress cone should be smooth, and the inner diameter of the stress cone should meet the size requirements of the cable insulation outer diameter; The inner diameter of the connecting tube should match the outer diameter of the cable core; The metal shell of the intermediate joint has no cracks or other defects.

(13) Check whether the cable head is tight, the sealing material should not be damp or ineffective, and there should be no moisture inside the cable. Generally, the method of observing the internal resistance of the cable water strip is used. Test the outer sheath of the cable before production.

(14) Check the special tools according to the installation process instructions.

(15) The accessories and cable models match, the quantity is complete, and the quality is good.

(1) After the joint is completed, install the joint bracket horizontally and firmly.

(2) Hang road signs and color plates as required.

(3) Clean up the construction site.