Expertly handles cable laying projects across China, including high and low voltage cable installations. 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 installations. Contact: Mr. Zhou, 15515916259.Tai 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 → Identification Plates

(2) Technical Measures

1) Prior to installation, the cable must be thoroughly inspected to ensure specifications, models, cross-sections, and voltage ratings meet requirements. The cable should have no distortion or damage.

2) Insulation measurements should be conducted prior to cable laying. For projects using cables rated below 1kV, the insulation resistance between conductors and to ground should be measured using a 1kV megger and should not be less than 10MΩ. After testing, the core wire should be discharged to ground.

3) After the cable test is completed, the cable ends should be sealed with rubber sheathing 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, pre-install the roller wheels.

5) Temporary Liaison Command System Setup

a. For shorter routes or outdoor cable laying, radio walkie-talkies can be used for communication, and handheld megaphones for directing.

b. Cable laying in high-rise buildings, radio walkie-talkies for directional communication, simple telephones for line-wide communication, handheld megaphones for directing (or use a multi-functional amplifier, which is the equipment for directing cable laying).

6) When laying multiple cables on a bridge架, draw the cable arrangement in a table or diagram beforehand 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 rolling cable drum method is generally used. When rolling, follow the direction indicated by the arrow on the cable drum. If there is no arrow, roll in the direction of the cable winding, but never in the opposite direction to prevent the cable from becoming loose.

b. The selection of the installation location for cable brackets should prioritize ease of laying, ideally 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 exit end positioned above the cable shaft.