电线电缆知识30问答（Wire cable knowledge 30 Q A）.docVIP

电线电缆知识30问答（Wire cable knowledge 30 Q A） Wire cable knowledge 30 Q A 1, commonly used wires, cables, according to the use of what types? Answer: according to the use can be divided into bare wire, insulated wire, heat-resistant wire, shielding wire, power cable, control cable, communication cable, radio frequency cable, etc.. 2 what are the insulation wires? Answer: insulated wires often are the following: PVC insulated wire, PVC insulated wire, PVC nitrile mixture of insulated cords, rubber insulated wire, buried underground agricultural plastic insulated aluminum wire, rubber insulation cotton textile cord, PVC insulated nylon sheathed wire, PVC insulated power and lighting cords etc.. 3, cable bridge suitable for what occasion? Answer: the cable tray is suitable for indoor and outdoor laying power cables and control cables in general industrial and mining enterprises. It can also be used for indoor and outdoor erection by telecommunication, radio and television departments. 4. What are the cable accessories? Answer: commonly used electrical accessories are cable terminal box, cable intermediate junction box, connecting pipe and connection terminal, steel plate connection slot, cable bridge frame and so on. 5 what is called cable intermediate joint? Answer: connecting cables and cables conductor, insulation shielding layer and protective layer, so that the cable line connection device, known as the cable intermediate connector. 6, what is the main electrical wiring? Answer: the main electrical wiring is connected in the main electrical equipment and bus power plant, substation, including the connection bus and auxiliary power system according to certain functional requirements. 7, in the selection of power cable section, which should comply with the provisions? Answer: the selection of power cables shall comply with the following principles: (1) the rated voltage of the cable shall be greater than or equal to the rated voltage of the power supply system of the