UL 497B-2004 标准详情
- 标准号:UL 497B-2004
- 中文标题:数据通信和火灾报警电路用保护器
- 英文标题:standard for protectors for data communications and fire-alarm circuits
- 标准类别:美国保险商实验室标准UL
- 发布日期:2004-06-14
1 SCOPE1.1 THESE REQUIREMENTS COVER PROTECTORS FOR DATA COMMUNICATIONS AND FIRE-ALARM CIRCUITS. 1.2 AS COVERED BY THESE REQUIREMENTS, DATA COMMUNICATIONS CIRCUIT PROTECTORS AND FIRE-ALARM CIRCUIT PROTECTORS CONSIST OF SINGLE- AND MULTIPLE-PAIR AIR-GA
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