IEEE 515:2004 pdf download IEEE Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Heat Tracing for Industrial Applications
3.2 braid or sheath: Metallic braid, metallic sheath, or other equivalent electrically conductive material intended to provide an electrical path to operate an electrical protection device.
3.3 certifying agency: Organization that validates that equipment meets tests and standards.
3.4 cold lead: An electrically insulated conductor used to connect a heating conductor to the branch-circuit conductors and designed so as not to produce appreciable heat.
3.5 connections: Terminations and splices used to attach a heating device to power wiring or to connect sections of devices. 3.6 dead leg: A segment of process piping that is not in the normal flow pattern.
3.7 Division 1: Terminology used for classification of an industrial area in which flammable gases or vapors, flammable liquids, combustible dusts, or ignitable fibers or flyings can be present under normal con- ditions, or from frequent breakdowns, or where failure of equipment could release materials and create simultaneous failure of electrical equipment. NOTE—See the NEC for a detailed definition.
3.8 Division 2: Terminology used for classification of an industrial area in which flammable gases or vapors, flammable liquids, combustible dusts, or ignitable fibers or flyings will only be present under abnor- mal conditions.
NOTE—See the NEC for a detailed definition.
3.9 electrical insulation: A dielectric material that insulates each conductor from other conductors or from conductive parts at or near earth potential.
3.10 electrical resistance heat tracing: The utilization of electric heating cables, other electric heating devices, and support components that are externally applied and used to maintain or raise the temperature of fluids/materials in piping and associated equipment.
3.11 end termination connection: The termination applied to the end of a heating cable that may be heat producing, opposite to where the power is supplied.
3.12 factory fabricated: A heating device assembled by the manufacturer, including end terminations and connections.
3.13 field assembled: A heating device supplied in bulk form with terminating components assembled on site.
3.14 heating device: Heating cable or surface heating unit.
3.15 heat loss: A quantitative value of energy flow from a pipe, vessel, or equipment to the surrounding ambient.
3.16 heat sink: A part that conducts and dissipates heat away from the pipe or equipment. Heat sinks, as related to pipe heating systems, can be pipe supports, valve operators, etc.
3.17 heat-tracing circuit: A heat-tracing circuit is comprised of one or more heating devices or segments connected to branch wiring of a single-circuit protection device.

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