This standard provides detailed recommendations for the system design, installation, maintenance and repair of electrical resistance trace heating systems in industrial and commercial applications, it does not include or provide for any applications in potentially explosive atmospheres.
The regulations pertains to trace heating systems that may comprise either factory fabricated or field-assembled (work-site) units, and which may be series or parallel trace heaters, or surface heaters (heater pads or heater panels) that have been assembled and/or terminated in accordance with the manufacturer’s instructions.

This Document is related to the following Topics (in bold):

25.040 Industrial automation systems
25.080 Machine tools
25.100 Cutting tools
25.140 Hand-held tools
25.160 Welding, brazing and soldering
25.180 Industrial furnaces

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