Specialists in nationwide cable laying projects, including high and low voltage cable installation. Services for residential, commercial, office buildings, subways, factories, chemical plants, etc. Professional construction team, ample personnel, and complete tools. Experienced in various pipeline, bridge, and cable trench construction. Contact: Mr. Zhou, 15515916259Tai Kang County Hua Zhan Electrical and Mechanical Installation Co., Ltd.
Cable laying construction methods
(1) Construction Process
Construction Preparation → Cable Tray Installation → Cable Laying → Insulation Testing → Signage
(2) Technical Measures
1) Prior to construction, detailed inspection of the cable is required, ensuring that specifications, models, cross-sections, and voltage ratings all meet the requirements. The cable should be free from twists, damage, or any other defects.
2) Conduct insulation measurement before laying the cable. If the project uses cables below 1kV, use a 1kV megger to test the insulation resistance between wires and to ground, which should not be less than 10MΩ. After the measurement, discharge the core wire to ground.
3) After the cable test is completed, the cable ends should be sealed with rubber sheath and then wrapped with tape.
4) Cable Laying Equipment: When using mechanical cable laying, the machinery should be installed in an appropriate location, and the wire rope and pulley should be properly set up. For manual cable laying, install the roller in advance.
5) Temporary Liaison Command System Setup
a. For shorter runs or outdoor cable laying, two-way radios can be used for communication, and handheld megaphones for directing.
b. Cable laying within high-rise buildings, use walkie-talkies for directional communication, simple phones for line-wide coordination, and handheld megaphones for directing (or use a multi-functional amplifier, which is the equipment used for cable direction).
6) When laying multiple cables on a bridge, a table or diagram should be prepared in advance based on the actual on-site conditions to prevent cable crossings and confusion.
7) Cable handling and bracket installation
a. For short-distance cable handling, the method of using a rolling cable drum is generally employed. When rolling, follow the direction indicated by the arrow on the cable drum. If there is no arrow, roll the cable in the direction of its winding, but never in the opposite direction to prevent the cable from becoming loose.
b. The selection of cable bracket installation locations should prioritize ease of laying, generally near the start and end points of the cable. During installation, attention should be given to the rotation direction of the cable shaft, with the cable outlet end positioned above the cable shaft.
