Self-Regulating Heating Cable for Industrial Heat Tracing
Self-Regulating Heating Cables
Self-regulating heating cables adjust their local heat output in response to temperature. They are suitable for many industrial freeze-protection and temperature-maintenance applications and can respond to different local conditions along a circuit.
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Typical applications
Self-regulating cables are widely used for pipe freeze protection, process temperature maintenance, tank and vessel connections, instrument lines and other industrial applications.
Selection criteria
Important criteria include required output at design temperature, maintain and exposure temperatures, supply voltage, maximum circuit length, starting current, jacket material, chemical environment and hazardous-area requirements.
The stated output applies to defined test conditions. For a warm process pipe, the output curve at the actual maintenance temperature matters. Maximum operating and exposure temperatures are assessed separately. A freeze protection cable is therefore not automatically suitable for hot cleaning or a much higher process temperature.
Standards reference (checked 14 October 2026): For heating cables and assemblies outside hazardous areas, IEC/IEEE 62395-1:2024 is the international reference for general requirements and testing. Germany still lists DIN EN 62395-1:2014-10 as the current national edition.
Hazardous areas
Suitable cable variants and approved system components must be selected for hazardous locations. Certificates and permitted operating conditions must be checked for the actual product.
Standards reference (checked 14 October 2026): IEC/IEEE 60079-30-1:2025 and IEC/IEEE 60079-30-2:2025 are international references for resistance trace heating in hazardous areas. Germany still lists DIN EN 60079-30-1:2018-04 and DIN EN 60079-30-2:2018-04 as current national editions. Equipment group, permitted EPL, protection concept and evidence for the actual assembly determine suitability.
Accessories and connections
A complete system includes compatible power connections, end terminations, tees, junction boxes, fixing materials, sensing and controls. Component compatibility is part of the system design.
Cold start and maximum circuit length
Electrical design takes the lowest start-up temperature into account. A cold self-regulating cable may initially draw more current than it does during normal operation. Maximum circuit length is therefore taken from product-specific tables for supply voltage, start-up temperature and the protective device. All connected branches contribute to the total. A nominal rating such as 10, 20 or 30 W/m alone is insufficient to determine circuit protection or maximum length.
Agree the brand and budget with us: our engineering is independent of a single manufacturer. Depending on suitability, we select Pro Therm own-brand materials or products from eltherm, BARTEC, RAYCHEM/Chemelex and Thermon. Tell us your preferred construction and budget range.
Standards reference (checked 14 October 2026): IEC/IEEE 62395-2:2024 addresses system design, installation, maintenance and repair outside hazardous areas. DIN EN 62395-2:2014-12 remains the current German national edition. Record the agreed edition in the project documentation.