1、常用的电线、电缆按用途分有哪些种类？ 1, the commonly used what types of wire and cable according to utility cent? 答：按用途可分为裸导线、绝缘电线、耐热电线、屏蔽电线、电力电缆、控制电缆、通信电缆、射频电缆等。 Answer: according to the application can be divided into bare wire, insulated wire, heat-resistant wires, shielded wires, power cables, control cables, communication cables, rf cables and so on. 2、绝缘电线有哪几种？ 2, what kind of insulated wire are there? 答：常有的绝缘电线有以下几种：聚氯乙烯绝缘电线、聚氯乙烯绝缘软线、丁腈聚氯乙烯混合物绝缘软线、橡皮绝缘电线、农用地下直埋铝芯塑料绝缘电线、橡皮绝缘棉纱纺织软线、聚氯乙烯绝缘尼龙护套电线、电力和照明用聚氯乙烯绝缘软线等。 Answer: often the insulated wire has the following kinds: PVC insulated wire, PVC insulated flexible wire, nitrile soft PVC compounds insulation wire, rubber insulated wire, agricultural underground buried plastic insulation aluminum core wire, rubber insulation cotton textile soft wire, PVC insulated nylon sheathed wire, electric power and lighting soft PVC insulated wire and so on. 3、电缆桥架适合于何种场合？ 3, cable tray is suitable for the occasion? 答：电缆桥架适用于一般工矿企业室内外架空敷设电力电缆、控制电缆，亦可用于电信、广播电视等部门在室内外架设。 Answer: cable bridge is applicable to general industrial and mining enterprises inside and outside aerial power cable, control cable laying, can also be used in telecommunications, broadcasting and television and other departments in the indoor and outdoor set up. 4、电缆附件有哪些？ 4, cable accessories have? 答：常用的电附件有电缆终端接线盒、电缆中间接线盒、连接管及接线端子、钢板接线槽、电缆桥架等。 Answer: the commonly used electrical accessories have cable terminal connector, cable junction box, connecting the middle tube and terminal blocks, wiring trough, cable tray of the steel plate, etc. 5、什么叫电缆中间接头？ 5, what is joint between the cable? 答：连接电缆与电缆的导体、绝缘屏蔽层和保护层，以使电缆线路连接的装置，称为电缆中间接头。 Answer: the connecting cable and the cable conductor, insulation shielding layer and protective layer, so that the cable line connection device, called a cable joint in the middle. 6、什么叫电气主接线？ 6, what is the main electrical wiring? 答：电气主接线是发电厂、变电所中主要电气设备和母线的连接方式，包括主母线和厂用电系统按一定的功能要求的连接方式。 A: the main electrical wiring is the main electrical equipment in power plant, substation and busbar connection mode, including the mistress line and auxiliary power system in a certain function requirements of connection mode.