(1) straighten the cable: the cable will leave a proper margin after the leveling, in the cable to be connected to the end of the 2m respectively straighten, wipe clean, overlap each other 200mm, in the middle of the center for the center line, as the center of the joint.
(2) Strip the outer layer and armor: from the center marking line in the two cables were measured on the decision of 800mm, 500mm, stripped of the outer sheath; 50mm from the outer sheath breaks on the armor with a copper wire tied three times or with armored tape card, with a hacksaw along the copper wire tied at the edge of the card or saw a ring scar.
(3) online core end measurement of the length of the connecting tube plus 5mm excision of the core insulator, by the core insulation fracture measurement of the insulator 35mm, cut into a 30mm long cone, crimp connecting tube.
Cable joints, also known as cable head. After the cable is laid, in order to make it a continuous line, the sections of the line must be connected as a whole, these connections are called cable joints. The cable joints in the middle part of the cable line are called intermediate joints, while the cable joints at the two ends of the line are called terminal heads. Cable glands are used to lock and fix the incoming and outgoing wires, and play a role in waterproofing, dustproofing and vibration-proofing.
Heating wire joints will not only cause a lot of power loss, but also will seriously affect the normal operation of electrical equipment, light is the line in the work of the current increases, shortening the life of the electrical equipment, heavy is the sudden interruption of the ongoing production, scientific research, medical and other activities, but also caused by fires and electrocution accidents and so on, resulting in incalculable losses.
Metal shielding in the cable and the role of the joints is mainly used to conduct the cable fault short-circuit current, as well as shielding electromagnetic fields on the adjacent communications equipment electromagnetic interference, the operating state of the metal shielding in a good state of grounding is at zero potential, when the cable faults, it has the ability to conduct short-circuit current in a very short period of time. Grounding wire should be reliably welded, the two end boxes cable body on the metal shield and armored tape firmly welded, the grounding of the terminal head should be reliable.