UL 499-2005《安全电加热设备的UL标准.第13版》

1.1 These requirements cover heating appliances rated at 600 V or less for use in unclassified locations
in accordance with the National Electrical Code (NEC), ANSI/NFPA 70.
1.2 These requirements do not cover electric heating equipment or appliances that are covered by
individual requirements that are separate from this Standard.
1.3 For the purposes of this Standard, a heating appliance is defined as an electrically energized product
that directly or indirectly generates heat to perform its intended function.
1.4 These requirements also cover electrically energized products that generate steam for other than
space heating purposes and have an electrical power rating of 15 kW or less per steam generating vessel.
1.5 Steam generating products of the type described in 1.4 having an electrical input power rating of more
than 15 kW per steam generating vessel are to be evaluated by the requirements in the Standard for
Heating, Water Supply, and Power Boilers – Electric, UL 834.
1.6 Each s