This Standard is intended to be read together with the Standard for Rotating Electrical Machines ?C General Requirements@ UL 1004-1. The numbering of the Sections in this Standard corresponds to the like numbered Sections in UL 1004-1. The numbering of the paragraphs are unique to this Standard@ and do not directly correspond to the like numbered paragraphs in UL 1004-1. The requirements in this Standard supplement or amend the requirements in UL 1004-1. The requirements of UL 1004-1 apply unless modified by this Standard. For Sections not shown@ refer to the Standard for Rotating Electrical Machines ?C General Requirements@ UL 1004-1. This Standard covers electric generators@ sometimes referred to as generator heads@ which@ when coupled with prime movers@ such as engines or electric motors@ are used to produce electricity. This Standard covers generators (DC machines) and alternators (AC machines) rated 7@200 volts or less. This Standard does not cover stationary or portable generator assemblies@ which are respectively covered under the Standard for Stationary Engine Generator Assemblies@ UL 2200@ and the Outline for Portable Engine-Generator Assemblies@ Subject 2201. This Standard does not cover generators intended for use in hazardous locations as defined in the National Electrical Code ?@ NFPA 70. The National Electrical Code? and NEC? are registered trademarks of the National Fire Protection Association@ Inc.@ Quincy@ MA 02169. In the context of this document@ the term generators shall be understood to apply to both AC and DC machines.
UL 1004-4-2008 history
2018UL 1004-4 BULLETIN-2018 UL Standard for Safety Electric Generators (COMMENTS DUE: March 26@ 2018)
2018UL 1004-4-2018 UL Standard for Safety Electric Generators (Third Edition)
2017UL 1004-4 CRD-2017 UL Standard for Safety Electric Generators - Section / Paragraph Reference: 6A (new)@ Table 6A.1@ 7.2@ 7.3 Subject: Maximum temperatures requirements for standby generators (Edition 2: October 25@ 2011)
2015UL 1004-4 BULLETIN-2015 UL Standard for Safety Electric Generators (COMMENTS DUE: APRIL 6@ 2015)