Prepare insulation sheath before installation

1. Check the insulation jacket and other materials, and check in detail whether it is qualified, and find that the materials such as the unqualified insulation jacket are replaced and replaced in time.

2. Handle relevant procedures with traffic, traffic police, afforestation commissions, and city supervision agencies.

3. Prepare tools such as temporary cable, motorized grinder, and crane.

4. Prepare a power-grinding mill, temporary wire, and other tools for erecting the wire (adjusting the sag of the ground wire).

5. Grab the ground anchors for placing and tightening the temporary lines.

6. Before installing the insulation sheath, a crossover grid of 10kV power lines, low-voltage lines, communication lines, highways, etc. shall be erected.

7. Handle the first type of work ticket for the blackout line.

8. Prepare safety devices such as electroscopes and grounding wires that are used after a power failure.

9. In order to prevent mechanical equipment from malfunctioning, reserve mechanical equipment, such as a power grinder, should be prepared for power failure.

10. Organize all construction personnel to study “Work Safety Procedures” to increase the safety awareness of all construction personnel.

Insulation grade material insulation level regulations

(1) Working insulation: insulation required for normal operation of equipment

(2) Basic insulation: Insulation that provides basic protection against electric shock

(3) Additional insulation: In addition to basic insulation, a separate insulating sheath material is applied to protect against electric shock if the basic insulation fails (4) Double insulation: Insulation consisting of basic insulation plus additional insulation

(5) Reinforced Insulation: A single insulation structure that provides protection against electric shock equivalent to double insulation under the conditions specified in this standard

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