车辆段客车检修规程规定:客车出库质量要求为母车单车正、负线与地间绝缘电阻应大于2万欧,子车单车应大于5万欧。铁道部(75)机辆字789号文件规定客车鉴定标准为一、二级车各配线绝缘符合规定;三级车为超过二级范围但没有不合格者;不合格车为配线绝缘不良,接地着灯(与同车厢同电压灯泡)。客车电源改用感应予发电机及晶体管控 Vehicle depot maintenance rules: bus quality requirements for the mother car bicycle positive and negative lines and ground insulation resistance should be greater than 20,000 European children, bicycles should be more than 50,000 units of bicycles. Ministry of Railways (75) Machine Word 789 documents the provisions of the bus for the identification of a, two cars meet the provisions of the insulation of the wiring; three cars over the second level but not failed; unqualified car wiring poor insulation , Grounded lights (with the same voltage with the compartment light bulb). Passenger car power sensor to the generator and transistor control