Introduction to the Installation Methods of Electrical Wires and Cables

The installation methods of electrical wires and cables are introduced based on the working characteristics of electrical wires and cables. The personnel responsible for the electrical wire and cable lines must not only abide by the prescribed regulations but also pay special attention to some safety and other issues.

1. Electrical wire and cable lines are concealed and more complex than overhead lines, with potential unsafe factors. Before the start of the line task, it is necessary to carefully check the nameplates.

2. When mining cables are installed parallel to heat pipelines, a distance of 2 meters should be maintained, and when crossing, a distance of 0.5 meters should be maintained.

3. The bending radius of cables, for multi-core cables, should not be less than 15D, and for single-core cables, it should not be less than 20D (D is the outer diameter of the cable).

4. Electrical cables have a certain capacitance and have charging and discharging characteristics. Before grounding after power off, during withstand voltage tests and before measuring insulation resistance, the cables should be fully discharged phase by phase.

5. The basic requirements for the ends and intermediate joints of electrical wires and cables: The conductor connection is good; the insulation is reliable, and it is recommended to use irradiated cross-linked heat-shrinkable silicone rubber insulation materials; the sealing is good, sufficient mechanical strength, and can adapt to various operating conditions.