1 Scope and object
This part of IEC 62395 provides detailed recommendations for the system design, installation, maintenance
and repair of electrical resistance trace heating systems in industrial and commercial
applications. This technical specification does not include or provide for any applications
in potentially explosive atmospheres.
This specification pertains to trace heating systems that may comprise either factory
constructed or field (work-site) assembled units, and which may be series heater cables,
parallel heater cables, heater pads or heater panels that have been assembled and/or
terminated in accordance with the manufacturer’s instructions for connection to voltage
supplies up to and including 450 V/750 V.
This Technical specification does not cover induction, impedance or skin effect heating.
Trace heating systems can be grouped into different types of installations. These
are characterized by different requirements for testing and are usually certified
for a specific type of installation or application. Typical applications for the different
types of installation are as follows:
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a) Installations of trace heating on pipes, vessels and associated equipment. Applications
include:
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b) Outdoor exposed area installations of trace heating. Applications include:
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c) Installation with embedded trace heating. Applications include:
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d) Installations with trace heating inside conduit or piping. Applications include:
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– snow melting – in conduit;
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– floor warming – in conduit;
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– frost heave prevention – in conduit;
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– underground thermal energy storage systems – in conduit;
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– internal trace heating of potable water lines;
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– enclosed drains and culverts.