This Standard is intended to be read together with the Standard for Rotating Electrical Machines ?C General Requirements@ 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. This Standard covers electric generators@ also referred to as alternators@ which@ when coupled with prime movers@ such as engines or electric motors@ are used to produce electricity. This Standard covers generators@ including those for standby use rated 34@000 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 Standard for Carbon Monoxide (CO) Emission Rate of Portable Generators@ UL 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.