Application Methods, Materials And Equipment Of Piercing Branch Cables In High-rise Shafts

6.1 Materials:
6.1.1 The cable shall comply with the requirements of "Polyvinyl chloride insulated cables with rated voltage of 450/750V and below" (GB5023), with intact insulation layer, uniform thickness, and heat-resistant and flame-retardant
marks.
6.1.2 Cable insulation piercing connector shall comply with the requirements of "Low-voltage circuit connection devices for household appliances and similar purposes" (GB13140) and "Electric Power Fittings" (GB/T2317.3-2000), and have the following properties:
1. Mechanical properties: The connector has no cracks under the pulling force of the wire.
2. Waterproof insulation performance: The underwater insulation strength is as high as 15KV (medium voltage) / 6KV (low voltage).
3. Temperature rise performance: When a large current passes through, the temperature rise of the connector is lower than the temperature rise of the connecting wire.
4. Electrical performance: The special torque bolt ensures constant puncture pressure and ensures good electrical contact.
5. Cable piercing connector Technical Parameters
ipc connector Technical Parameters
6.2 Main equipment and tools: megohmmeter (ZC-7, 500V), socket wrench (with cable clamp), hacksaw, pliers, screwdriver, wallpaper knife, etc.
7. Quality Control
7.1 According to the "Construction Quality Acceptance Code for Building Electrical Engineering" (GB50303-2000) and the "Installation" in the Shandong Provincial Engineering Construction Standard "Construction Engineering Construction Process Code" (DBJ14-032-2004).
7.2 Cable laying is strictly prohibited from having defects such as twisting, armor flattening, sheath fracture and surface scratches.
7.3 The specifications of the cable ipc electrical connectors connection fittings should be compatible with the cable core wire.
7.4 The cables are arranged neatly, and the vertical spacing between the support points is not more than 1500mm; the distance from the top layer of the cable support to the top of the shaft is not less than 150~200mm, and the distance from the bottom layer to the ground is not less than
50~100mm.
7.5 The clamps and brackets used to fix AC single-core cables or each phase cable after phase separation shall not form a closed ferromagnetic circuit.