GB/T 42740-2023Safety guidelines for wires and cables used in rail transport (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting: Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed by China Electrical Equipment Industry Association: This document is under the jurisdiction of the National Wire and Cable Standardization Technical Committee (SAC/TC213): This document is drafted by: Jiaozuo Railway Cable Co:, Ltd:, Tianshui Railway Cable Co:, Ltd:, Shanghai National Cable Inspection Co:, Ltd: Co:, Ltd:, Shanghai Shentong Metro Group Co:, Ltd:, Shanghai Tianyou Engineering Consulting Co:, Ltd:, Jiangsu Shangshang Cable Group Co:, Ltd:, Jinbei Electric Gonghengyang Cable Co:, Ltd:, Jiangsu Zhongtian Technology Co:, Ltd:, Far East Cable Co:, Ltd:, Anhui Lianjiaxiang Special Cable Co:, Ltd:, Guangdong Zhonglian Cable Group Co:, Ltd:, Tianjin Jinshan Wire and Cable Co:, Ltd:, Guangzhou Lingnan Cable Co:, Ltd:, Nanyang Cable (Tianjin) Co:, Ltd:, Hainan Witt Electric Group Co:, Ltd:, Yangzhou Shuguang Cable Co:, Ltd:, Jiangsu Jiangyang Cable Co:, Ltd:, He Nanjinshui Cable Group Co:, Ltd:, Jiangsu Hengtong Power Cable Co:, Ltd:, Shangwei Co:, Ltd:, Zhejiang Wanma Co:, Ltd:, Jiangxi Suzhongli Group Co:, Ltd:, Kunming Cable Group Kundian Electric Cable Co:, Ltd:, Hangzhou Cable Co:, Ltd:, Shandong Hualing Cable Co:, Ltd:, State Grid Heilongjiang Electric Power Co:, Ltd: Electric Power Research Institute, Baosheng Technology Innovation Co:, Ltd:, Wuxi Jiangnan Cable Co:, Ltd: Co:, Ltd:, Shanghai Qifan Cable Co:, Ltd:, Jiangsu Hengtong Cable Technology Co:, Ltd:, Hunan Valin Cable Co:, Ltd:, Zhejiang Zheng Thai Cable Co:, Ltd:, Hebei Huatong Cable Group Co:, Ltd:, Weihai Honglin Power Technology Co:, Ltd:, Yangzhou Zhongda Cable Co:, Ltd:, Shanghai Pudong Wire and Cable (Group) Co:, Ltd:, Wuxi Huamei Cable Co:, Ltd:, Jiangsu Yongding Shengda Cable Co:, Ltd:, Wuxi Mingzhu Cable Co:, Ltd:, Zhejiang Yuantong Cable Manufacturing Co:, Ltd:, Chizhou Qifan Cable Co:, Ltd:, Dongguan Minxing Cable Co:, Ltd: Company, Jiangsu Huaya Cable Co:, Ltd:, Sichuan Xinrong Cable Co:, Ltd:, Guangzhou Xinxing Cable Industry Co:, Ltd:, Tonghao Cable Group Mission Ltd: The main drafters of this document: Yang Yongqian, Wang Hongfei, Zhang Huiqin, Li Chuang, Wang Wei, Liao Junfeng, Wang Yongcai, Hu Shaozhong, Xie Shuhong, Xu Jing, Huang Donglian, Zhai Yuanhui, Zeng Zhimin, Chen Gang, Nie Fuqiang, Li Ju, Liang Guohua, Chen Yijun, Jinhang, Guan Xinyuan, Shen Zhifei, Liu Huanxin, Zhang Rui, Xi Youjian, Teng Zhaofeng, Pan Maolong, Wang Lei, Fang Quansheng, Ma Zhuang, Gao Zuohai, Huaiping, Zhang Gongzhuo, Tao Ruixiang, Wang Huaian, Li Qifeng, Xue Shouping, Chen Wei, Zhang Linrui, Wang Jianlu, Feng Yaocai, Xu Jixin, Tong Bo, Song Qiang, Yu Jinhua, Qiao En, Zhou Xin, Yan Chunzi, Wang Yongqing, Zhu Zengle, Rui Min, Zheng Qingzhong, Lu Xiuwu, Guo Mingming: Safety guidelines for wires and cables for rail transit

1 Scope

GB/T 42740-2023 gives the safety guidelines for wires and cables in rail transport. Cable is the material most likely to kill people in a rail fire, not because it starts the fire but because it propagates it along the tunnel and because burning insulation produces smoke that blinds and gases that incapacitate before the heat reaches anyone - which is why rail cable is specified for low smoke and zero halogen before anything else. It also has to survive vibration, oil, ozone and thirty years of thermal cycling. The standard sets the environmental conditions along a rail line, the classification and identification of cable products, the general rules for selecting them, and the general rules for the safety-related aspects of their design: appearance, rated voltage, current carrying capacity, temperature effects, mechanical stress, shielding, and the fire performance. It took effect on 1 December 2023.

This document specifies the use environment, classification and labeling, general rules for selection, general rules for design, laying and protection, and inspection of wires and cables for rail transit: Check the requirements related to safety factors such as testing, packaging, transportation and storage: This document is applicable to the production, use and acceptance of wires and cables for rail transit engineering and equipment: This document does not apply to the production, use and acceptance:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: GB/T 2900:

10 Electrotechnical terminology cables GB/T 6995:

3 Wire and cable identification marking methods - Part 3: Wire and cable identification markings GB/T 6995:

4 Wire and cable identification marking method - Part 4: Electrical equipment wire and cable insulation core identification marking GB/T 6995:

5 Identification marking methods for electric wires and cables - Part 5: Identification markings for insulated cores of power cables

GB/T 10411-2005 Urban Rail Transit DC Traction Power Supply System

GB/T 12527 Aerial Insulated Cables with Rated Voltage 1kV and Below

GB/T 19666-2019 General rules for flame-retardant and fire-resistant wires and cables or optical cables

GB/T 28427 27:5kV single-phase AC XLPE insulated cables and accessories for electrified railways

GB 31247-2014 Classification of combustion performance of electric and optical cables

GB/T 34016-2017 General rules for rodent and termite-proof wires and cables

GB 50157 Code for design of subway

JB/T 8996 Guidelines for Selection of High Voltage Cables TB10006 Railway Communication Design Code TB10007 Railway Signal Design Code exceeding450/750V-Guidetouse)

3 Terms and Definitions

The terms and definitions defined in GB/T 2900:10 apply to this document:

4 Environmental conditions along the rail transit

1 Environmental conditions along the rail transit project Rail transit is divided into four categories: main line railway, urban (suburban) railway, intercity rail transit and urban rail transit: The tracks are laid underground,