UL 1558-2009 Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear.pdf
文档页数：58文档大小：632.79KB文档格式：pdfUL UL1558 ⑧ Underwriters Laboratories Inc . Standard for SafetyMetal-Enclosed Low-VoltagePower Circuit BreakerSwitchgearjuly9,2009-UL1558 Underwriters Laboratories Inc .( UL) 333 Pfingsten RoadNorthbrook ,IL 60062-2096UL Standard for Safety for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear ,UL 1558Fourth Edition ,Dated February 25 ,1999Revisions :This Standard contains revisions through and including July 9 ,2009SUMMARY OF TOPICSThis revision to UL 1558 includes the following changes in requirements : Location of Operating HandlesUpdate ReferencesCorrect Text in Table 7.1Clarify Requirement for Wire Bending Space with Angled LugsMiscellaneous Editorial RevisionsText that has been changed in any manner is marked with a vertical line in the margin .Changes inrequirements are marked with a vertical line in the margin and are followed by an effective date noteindicating the date of publication or the date on which the changed requirement bees effectiveThe following table lists the future effective dates with the corresponding reference . Future Effective DatesJanuary 9 ,2013Paragraphs 2.1,4.1,5.1,6.1.1,7.1,8.1.1,10.1,11.1, 12.1.1...
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