IEEE 515-1997 pdf download IEEE Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Heat Tracing for Industrial Applications
1.2 Purpose
The provisions of this standard should ensure that process, fluid, or material temperatures are maintained and providelectrical, thermal, and mechanical durability to the heat-tracing svstem, such that in normal use its performance isreliable and poses no canger to the user or surroundings.This standard is to serve as a complementarv document to thosenational and international standards addressing electrical resistance heat tracing such as the National Electrical CodeNEC) NFPA 70-1996Article 427: BS 6351-1983 B4-,parts 1..2. and 3; EN 50019-1994(B5]; IEC 79-0 (1983)B9]:IEC 79-7 (1990)B11 : and others.
2. References
This standard shall be used in conjunction with the following publications. When the following standards aresuperseded by an approved revision, the revision shall apply.
ASTM D 5025-94,A Laboratory Burner Used for Small-Scale Burning Tests on Plastic Materials.
ASTM D 5207-91, Calibration of 20 and 125 mm Test Flames for Small-Scale Burning Tests on Plastic Materials
NFPA 70-1996,National Electrical Code图(NECO).4
NFPA 325-1994, Fire Hazard Properties of Flammable Liquids, Gases, and Volatile Solids.
NFPA 497M-1991, Classification of Gases, Vapors, and Dusts for Electrical Equipment in Hazardous (Classified)Locations.
3. Definitions
The following definitions apply to the subject matter presented in this standard:
3.1 ambient temperature: The temperature surrounding the object under consideration, Where electrical heatingcable is enclosed in thermal insulation, the ambient temperature is the temperature exterior to the thermal insulation.3.2 authority having jurisdiction: The organization, office, or individual that has the responsibility and authority forapproving equipment,installations,or procedures.
3.3 certifying agency: Organization that validates that equipment meets tests and standards.3.4 cold-lead connection: 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 dead leg: A segment of process piping that is not in the noral flow pattern.
3.6 Division 1: Terminology used for classification of an industrial area in which flammable gases or combustibledusts can be present under normal conditions, or from frequent breakdowns, or where failure of equipment couldrelease materials and create simultaneous failure of electrical equipment.(Refer to the NEC for a detailed definition.)
3.7 Division 2: Terminology used for classification of an industrial area in which fiammable gases or combustibledusts will only be present under abnormal conditions. (Refer to the NEC for a detailed definition.)
3.8 electrical imsulation: A dielectric material that insulates each conductor from other conductors or from conductiveparts at or near earth potential.
3.9 electrical resistance heat tracing: The utilization of electric heating cables, other electric heating devices, andsupport components that are externally applied and used to maintain or raise the temperature of fluids/materials inpiping and associated equipment.
3.10 end termination connection: The termination applied to the end of a heating cable that may be heat producing.
opposite where the power is supplied.
3.11 factory fabricated: A heating cable or surface heating device assembled by the manufacturer, includingterminations and connections.
3,12 field assembled: Heating cable or surface heating device supplied in bulk form with terminating components tobe assembled in the field.
3.13 heater de-energized maximum intermittent exposure temperature: The maximum temperature of any surfaceadjacent to the heating device that the de-energized heating device can withstand for specified periods.
IEEE 515-1997 pdf download
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