• How many cables are laid?

    How many cables are laid?

    28-02-2019

    A: There are the following: (1) buried directly in the ground; (2) installed in the cable trench; (3) installed in an underground tunnel; (4) Installed on the inner wall of the building or on the ceiling; (5) installed on the bridge; (6) laid in the discharge pipe; (7) Laying on the bottom of the water.

  • What are the advantages of cross-linked heat shrink cable accessories?

    What are the advantages of cross-linked heat shrink cable accessories?

    20-02-2019

    A: This is a new type of material. Compared with other types of accessories, it has the advantages of superior electrical performance, small size, small quality, easy installation, and matching materials. It also has weather resistance, anti-staining, self-extinguishing, etc. ability.

  • What inspections should be carried out after the busbar installation is completed?

    What inspections should be carried out after the busbar installation is completed?

    11-02-2019

    A: The following checks should be made: (1) The processing, preparation and welding of metal components shall comply with the regulations; (2) All parts such as bolts, washers and split pins shall be complete and reliable; (3) Busbar preparation and mounting brackets shall comply with the regulations, and the electrical distance between the phases and the ground shall meet the requirements; (4) Po...

  • What are the requirements for the processing of cable protection tubes?

    What are the requirements for the processing of cable protection tubes?

    01-02-2019

    Answer: (1) The nozzle should be and sharply angled, and the nozzle should be made into a flare. (2) After the cable tube is bent, there should be no cracks and significant concave sag, and the degree of bending should not be greater than 10% of the outer diameter of the tube; the bending radius of the cable tube should not be less than the minimum allowable bending radius of the cable to be penet...

  • What are the common equipment for cable laying?

    What are the common equipment for cable laying?

    26-01-2019

    Answer: (1) Air compressors are mainly used to damage the road surface and prepare for laying cables later; (2) Electric hoist or cable traction machine, mainly used for towing cables; (3) Cable conveyor, used with the tractor to overcome the huge friction and reduce the damage to the cable; (4) Cable tray pay-off bracket; (5) Roller device; (6) Anti-smashing, reducing the distortion of the wire r...

  • What are the requirements for fire protection for cable holes?

    What are the requirements for fire protection for cable holes?

    19-01-2019

    Answer: For larger cable through holes, such as cables running through the floor, etc., when using fireproof blocking materials, according to the actual situation, first apply four to six layers of fireproof coating on the cable surface, the length is about 1.5m below the hole, and then The refractory material is processed into a fireproof blocking material with a certain strength, which ensures t...

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