• 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...

  • How to carry out moisture treatment before construction

    How to carry out moisture treatment before construction

    12-01-2019

    Making yellow wax ribbons, black glass paint strips, alkali-free glass ribbons for cable joints, etc. How to carry out moisture treatment before construction? Answer: (1) Constant temperature drying method: roll the insulating tape into a small roll with a diameter of 25~30mm, put it in a constant temperature drying oven at 110~120 °C for 4~5h, cool it out and put it into a dry sealed cylinder. (2...

  • What are the rules for cable protection?

    What are the rules for cable protection?

    05-01-2019

    Answer: (1) When the cable needs to be laid with protective tube, the inner diameter of the pipe should not be less than 1.5 times the outer diameter of the cable. The inner diameter of concrete pipe, clay pipe, asbestos and cement pipe should not be less than 100mm; (2) The bending radius of the cable tube shall comply with the requirements for the bending radius of the cable to be penetrated; (3...

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