Red Line
December 14, 2016
UL 2021
UL Red Line
Edition 4
Published Date: December 14, 2016
Last Revision: February 02, 2021
Scope
020210-000000-0000001 Scope
1.1 These requirements cover fixed and location-dedicated electric room heating equipment rated 600 volts or less to be employed in ordinary locations in accordance with the National Electrical Code, ANSI/NFPA 70.
1.2 These requirements do not cover movable heaters, wall- or ceiling-hung heaters, baseboard heaters, duct heaters, central-heating furnaces, fan-coil units, panel- or cable-type radiant-heating equipment, electric boilers, or any other electric heating equipment or appliances that are covered in or as a part of separate, individual requirements.
Summary of Topics s2021_4_sum.htmlSummary of Topics
This revision of ANSI/UL 2021 includes a Clarification of Requirements for Heating Elements and miscellaneous editorial corrections.
Back to Standard 2021, Edition 4