Application Method Of Piercing Branch Cable In High-rise Shaft

Key points of operation:
5.4.1 Strip the sheath of the main multi-core cable and the branch cable (Note: There is no need for this step if the main and branch cables are both single-core).
Strip the outer sheath of the main multi-core cable and the branch cable by no more than 500mm
5.4.4-2); remove the cable filler and tie the branch cable to both ends of the main cable.
5.4.2 Connector connection position and branch line length. Determine the connector connection position and branch line length according to the position where the cable needs to be branched, and remove the excess branch line.
5.4.3 Insert the branch line into the branch line cap. Insert the branch line conductors into the branch line entrances at the left and right ends of the connector respectively. The blue one with the grounding conductor is the neutral line connector, and the gray one is the phase line connector.
5.4.4 The main line is inserted into piercing cable connector, and the torque nut is tightened by hand. Insert the connector into the main line branch position, and use a socket wrench to tighten the torque nut on the upper end of the connector until it falls off (the installation method of all connectors is the same). After all connectors are installed, the branch connection is completed
5.4.5 Cable insulation resistance test. The cable insulation resistance measured by a megohmmeter must be greater than
0.5MΩ.
5.4.6 Fix the branch cable. Fix the branch cable in accordance with the "Piercing Branch Power Cable Installation" in the "Electrical Shaft Installation".
5.4.7 Trial operation acceptance. After the installation of various distribution systems is completed and meets the requirements, it can be
powered on for trial operation, and the power supply is operated at no load for 24 hours. Record once every 2 hours. If there is no abnormality in the test,
the acceptance procedures are handled.
5.5 Labor organization:
Generally, the piercing electrical connectors branch cable installation team is set up with 4 to 6 people.
Serial number
Staff composition
Required number of people (people)
Task
1
Construction team leader
1
Responsible for the overall arrangement of the entire process of piercing wire connector branch cable installation and construction, and coordinate and arrange operators.
2
Technical personnel
1
Responsible for the technical disclosure, technical guidance and quality inspection of wire piercing connector branch cable installation and construction.
3
Experienced electrician
2~4
Specific implementation of piercing branch cable installation and construction.