What is the procedure for laying cables?

I. Laying cable operating procedures are how?1, cable lines to meet the needs of power supply and distribution, to ensure safe operation, easy maintenance.2, for direct laying of underground cables, should be protected by corrosion-resistant layer.3, direct burial of cables in the bottom of the trench shall be flat, no hard objects, otherwise should be laid in the bottom of the trench a layer of fine sand or soft soil. After that, cover the concrete protection board, and draw as-built drawings, marking the specific coordinates, parts and direction for maintenance and inspection.4, the buried depth of the cable and cable and all kinds of facilities cross the smaller spacing distance should be in line with the electrical requirements.5, armored cables laid vertically or horizontally, at the first end of the cable, turn and joints, need to be fixed with a card.6, to prevent the cable from twisting and bending during the laying of The turn of the cable should be in line with the bending radius of its laying. 7, the cable across the ground, buildings, need to be installed to protect the casing, a protective tube only wear a protective tube should be greater than 1.5 times the inner diameter of the cable diameter. 8, more than one cable laid side by side, the joints in the middle of the joints should be staggered before and after or through the steel pipe to protect it. 9, the cable in the river, the ends of the cable should be left 3 ~ 5m balance; bridge should be left 0.3 ~ 0.5m; building import and export cable terminals, should be left 0.3 ~ 0.5m; the terminals of the cable, should be left 0.3 ~ 0.5m. When crossing a bridge, 0.3～0.5m should be left; the terminal of the cable for the import and export of the building should be left with a balance of 1～1.5m.10. The metal sheath ends of armored cables and aluminum-coated (lead-coated) cables, the terminal of metal cables and the protection of the steel pipe should be reliably grounded, and the grounding resistance should be less than 10Ω.

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