UL 499 UL Standard for Safety Electric Heating Appliances

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UL 499 Document Information:

Title
UL Standard for Safety Electric Heating Appliances

Underwriters Laboratories Inc.

Publication Date:
Nov 17, 2005

Scope:

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.

These requirements do not cover electric heating equipment or appliances that are covered by individual requirements that are separate from this Standard.

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.

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.

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.

Each steam generating vessel in a multi-vessel unit shall comply with these requirements. The unit shall also be provided with the marking in 47.37.

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