UL 497A-2001 通信电路的辅助保护装置

标准号：UL 497A-2001
中文标准名称：通信电路的辅助保护装置
英文标准名称：UL Standard for Safety Secondary Protectors for Communication Circuits Third Edition; Reprint with Revisions Through and Including 6/14/2004
标准类型：M42
发布日期：2001/3/20 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：M42
国际标准分类号：29.120.50
适用范围：The requirements cover secondary protectors for use in single- or multiple-pair-type communications circuits used in the protected side of telecommunications networks that have an operating rms voltage to ground less than 150 volts and installed or used in accordance with the National Electrical Code, NFPA 70.