UL 864 BULLETINS-2003 标准详情
- 标准号:UL 864 BULLETINS-2003
- 中文标题:火警系统用控制装置和组件
- 英文标题:Control Units and Accessories for Fire Alarm Systems
- 标准类别:美国保险商实验室UL
- 发布日期:2003
Propoals for ANSI/UL 864 to revise (1) exception to 55.2.1 to change the retard-reset-restart period duration, (2) 49.3 to indicate that ground-fault annunciation is not required where normal operation is not affected by a single ground-fault and Fig
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