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UL 2577 OUTLINE - OUTLINE OF INVESTIGATION FOR SUSPENDED CEILING GRID LOW VOLTAGE SYSTEMS AND EQUIPMENT - ISSUE 4 Organization: UL
Date: 2012-06-22
Description: The suspended ceiling grid low voltage systems covered by this outline are intended to be installed as a suspended ceiling grid that provides mechanical support for the ceiling tiles and provides electrical connections between the low voltage power supply and the low voltage equipment.
UL 1693 - UL STANDARD FOR SAFETY ELECTRIC RADIANT HEATING PANELS AND HEATING PANEL SETS - THIRD EDITION; REPRINT WITH REVISIONS THROUGH AND INCLUDING OCTOBER 14, 2011 Organization: UL
Date: 2010-09-13
Description: These requirements do not cover the following: a) Heating equipment connected to the supply by use of a flexible cord with attachment plug; b) Heating equipment that is movable after installation; c) Heating equipment with integral means of producing air flow; d) Heating equipment manufactured and sold as an integral part of a floor or ceiling covering materials such as heated floor tiles, heated carpet, and heated laminate floor; e) Heating equipment exceeding 355 W/m2(33 W/ft2) when installed in concrete or poured masonry; f) Electric Space-Heating Cables of Article 424 Part V of the National Electrical Code, ANSI/NFPA 70; g) Heating panels and panel sets for mounted directly underfloor coverings in accordance with 424.99 of the National Electrical Code, ANSI/NFPA 70; and h) Radiant heating panels intended to be installed in a dropped or suspended ceiling.
UL 1673 - UL STANDARD FOR SAFETY ELECTRIC SPACE HEATING CABLES - THIRD EDITION; REPRINT WITH REVISIONS THROUGH AND INCLUDING OCTOBER 14, 2011 Organization: UL
Date: 2010-09-13
Description: These requirements apply to space heating cables intended for installation in ceilings of enclosed structures or within or beneath floors of enclosed structures where the floor is constructed of noncombustible material, concrete, or asphalt.

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