These requirements cover electric oil heaters for use with Nos. 5 and 6 fuel oil as defined in Specifications for Fuel Oils@ ASTM D396@ or other oils such as heat tranfer oils. Electric oil heaters are to be used in ordinary locations and installed in accordance with the National Electrical Code@ NFPA 70.These requirements do not cover electric oil heaters rated at more than 600 volts.
574-2003由UL - UL 发布于 2003-08-14,并于 2009-04-06 实施。
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