SIST EN IEC 62395-2:2026

Electrical resistance trace heating systems for industrial and commercial applications - Part 2: Application guide for system design, installation and maintenance (IEC/IEEE 62395-2:2024)

This part of IEC/IEEE 62395 provides detailed recommendations for the system design, installation, maintenance and repair of electrical resistance trace heating systems in industrial and commercial applications. This document does not include or provide for any applications in potentially explosive atmospheres.
This document pertains to trace heating systems that can comprise either factory fabricated or field-assembled (work-site) units, and which can 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.
The products covered by this document are intended to be installed by persons who are suitably trained in the techniques required and that only trained personnel carry out especially critical work, such as the installation of connections and terminations. Installations are intended to be carried out under the supervision of a qualified person who has undergone supplementary training in electric trace heating systems.
This document does not cover induction, impedance or skin effect heating.
Trace heating systems and surface 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 shown in Table 1.

Elektrische Widerstands-Begleitheizungen für industrielle und gewerbliche Zwecke - Teil 2: Anwendungsleitfaden für Systemauslegung, Installation und Wartung (IEC/IEEE 62395-2:2024)

Systèmes de traçage par résistance électrique pour applications industrielles et commerciales - Partie 2: Guide d'application pour la conception, l'installation et la maintenance du système (IEC/IEEE 62395-2:2024)

Sistemi za električno uporovno sledilno ogrevanje za industrijske in komercialne aplikacije - 2. del: Vodič za uporabo pri načrtovanju, vgradnji in vzdrževanju sistema (IEC/IEEE 62395-2:2024)

Ta del IEC/IEEE 62395 podaja podrobna priporočila za načrtovanje sistema, namestitev, vzdrževanje in popravilo sistemov električnega uporovnega sledilnega ogrevanja v industrijskih in komercialnih aplikacijah. Ta dokument ne vključuje ali predvideva nobenih aplikacij v potencialno eksplozivnih atmosferah.
Ta dokument se nanaša na sledilne ogrevalne sisteme, ki lahko obsegajo bodisi tovarniško izdelane ali na terenu sestavljene (na delovišču) enote, in ki lahko vključujejo serijske ali vzporedne sledilne grelnike, ali površinske grelnike (grelne plošče ali grelne panele), ki so bili sestavljeni in/ali zaključeni v skladu z navodili proizvajalca.
Izdelki, zajeti v tem dokumentu, so namenjeni za namestitev s strani oseb, ki so ustrezno usposobljene za potrebne tehnike, in da le usposobljeno osebje izvaja posebej kritična dela, kot so namestitev povezav in zaključkov. Namestitve naj bi se izvajale pod nadzorom kvalificirane osebe, ki je opravila dodatno usposabljanje v sistemih električnega sledilnega ogrevanja.
Ta dokument ne pokriva indukcijskega, impedančnega ali površinskega (skin effect) ogrevanja.
Sistemi sledilnega ogrevanja in površinskega ogrevanja se lahko razvrstijo v različne vrste namestitev. Te so označene z različnimi zahtevami za testiranje in so običajno certificirane za določeno vrsto namestitve ali aplikacije. Tipične aplikacije za različne vrste namestitev so prikazane v Tabeli 1.

General Information

• Status: Published
• Public Enquiry End Date: 31-Mar-2026
• Publication Date: 07-Jul-2026
• ICS: 25.180.10 - Electric furnaces
• Technical Committee: I09 - Imaginarni 09
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 07-Jul-2026
• Due Date: 11-Sep-2026
• Completion Date: 08-Jul-2026
• Ref Project: EN IEC 62395-2:2026 - Electrical resistance trace heating systems for industrial and commercial applications - Part 2: Application guide for system design, installation and maintenance

Relations

• Replaces: SIST EN 62395-2:2014 - Electrical resistance trace heating systems for industrial and commercial applications - Part 2: Application guide for system design, installation and maintenance
• Effective Date: 01-Sep-2026
• Referred By: SIST EN 60519-10:2013 - Safety in electroheat installations - Part 10: Particular requirements for electrical resistance trace heating systems for industrial and commercial applications
• Effective Date: 07-Jul-2026
• Referred By: SIST EN IEC 62395-1:2026 - Electrical resistance trace heating systems for industrial and commercial applications - Part 1: General and testing requirements (IEC/IEEE 62395-1:2024)
• Effective Date: 03-Feb-2026

Overview

SIST EN IEC 62395-2:2026 (IEC/IEEE 62395-2:2024) is an international standard providing comprehensive guidance on the system design, installation, maintenance, and repair of electrical resistance trace heating systems used in industrial and commercial environments. Developed jointly by IEC and IEEE, this standard replaces the previous IEC 62395-2:2013 edition, incorporating significant technical updates to improve safety, reliability, and practical implementation. Notably, the scope of this standard excludes applications in potentially explosive atmospheres, focusing on safe, effective use in general industrial and commercial settings.

Trace heating systems are commonly employed for process temperature maintenance, freeze protection, deicing, floor warming, and specialized heating scenarios in a variety of infrastructure and process sectors. This application guide enables designers, installers, and facility operators to apply best practices across the life cycle of these systems.

Key Topics

SIST EN IEC 62395-2:2026 addresses the following critical areas for electrical resistance trace heating systems:

• System Design: Guidance for assessing environmental conditions, thermal and electrical requirements, control and monitoring strategy, and documentation. Special attention is given to applications such as sprinkler systems and emergency safety equipment.
• Installation Best Practices: Step-by-step recommendations for preliminary site assessments, proper mounting, insulation, control and monitoring equipment, and system commissioning.
• Maintenance & Repair: Establishes routines for inspection, testing, and maintenance personnel training, with procedures for detection and rectification of faults and effective record-keeping.
• Application-specific Guidance: Includes dedicated sections on surface heating for vessels and piping, roof and gutter deicing, rail heating, snow melting, floor warming, frost heave prevention, and underground thermal energy storage systems.
• Technical Updates Over Previous Edition:
  • Expanded design guidance for trace heating on sprinkler systems, including new illustrations to minimize shadowing of spray patterns.
  • New, specific recommendations for trace heating of emergency eyewash units and safety showers.

Applications

Electrical resistance trace heating systems are essential in numerous industrial and commercial sectors. Typical applications include:

• Process Temperature Maintenance: Keeping process fluids, pipes, and tanks at desired operational temperatures in manufacturing plants, chemical facilities, and food processing industries.
• Freeze Protection: Preventing pipes, vessels, and equipment from freezing in cold environments, ensuring operational continuity.
• Fire Safety Systems: Efficient and compliant trace heating for sprinkler systems reduces risks associated with blockages by ice formation, supporting critical safety infrastructure.
• Safety Equipment: Design and installation guidance for trace heating of emergency eyewash units and safety showers, ensuring immediate accessibility during low ambient temperatures.
• Building Infrastructure: Addresses applications such as roof and gutter deicing, snow melting on pathways, floor warming for comfort heating, and frost heave prevention in cold storage facilities.
• Transportation: Rail and track heating to maintain functionality in adverse weather conditions.
• Energy Storage: Heating requirements for underground thermal energy storage to optimize energy management in buildings.

The standard is relevant for designers, installers, maintenance personnel, facility managers, and safety officers within these sectors.

Related Standards

For integrated compliance and further technical detail, consider the following related standards:

• IEC/IEEE 62395-1 - General requirements for electrical resistance trace heating systems for industrial and commercial applications.
• EN IEC/IEEE 62395-1:2026 (pending) - The harmonized European counterpart, providing essential baseline standards for safety and system functionality.

Consult local electrical installation legislation and building codes for additional requirements and supplementary standards as relevant to your project and jurisdiction.

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Keywords: SIST EN IEC 62395-2:2026, electrical resistance trace heating, system design, installation, maintenance, industrial trace heating, commercial trace heating, freeze protection, process heating, compliance, IEC/IEEE standards

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2026
Nadomešča:
SIST EN 62395-2:2014
Industrijski in komercialni sistemi električnih uporovnih grelnih trakov - 2. del:
Vodilo za načrtovanje sistema, namestitev in vzdrževanje (IEC/IEEE 62395-2:2024)
Electrical resistance trace heating systems for industrial and commercial applications -
Part 2: Application guide for system design, installation and maintenance (IEC/IEEE
62395-2:2024)
Elektrische Widerstands-Begleitheizungen für industrielle und gewerbliche Zwecke - Teil
2: Anwendungsleitfaden für Systemauslegung, Installation und Wartung (IEC/IEEE
62395-2:2024)
Systèmes de traçage par résistance électrique pour applications industrielles et
commerciales - Partie 2: Guide d'application pour la conception, l'installation et la
maintenance du système (IEC/IEEE 62395-2:2024)
Ta slovenski standard je istoveten z: EN IEC 62395-2:2026
ICS:
25.180.10 Električne peči Electric furnaces
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62395-2

NORME EUROPÉENNE
EUROPÄISCHE NORM July 2026
ICS 25.180.10 Supersedes EN 62395-2:2013
English Version
Electrical resistance trace heating systems for industrial and
commercial applications - Part 2: Application guide for system
design, installation and maintenance
(IEC/IEEE 62395-2:2024)
Systèmes de traçage par résistance électrique pour Elektrische Widerstands-Begleitheizungen für industrielle
applications industrielles et commerciales - Partie 2: Guide und gewerbliche Zwecke - Teil 2: Anwendungsleitfaden für
d'application pour la conception, l'installation et la Systemauslegung, Installation und Wartung
maintenance du système (IEC/IEEE 62395-2:2024)
(IEC/IEEE 62395-2:2024)
This European Standard was approved by CENELEC on 2026-05-18. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62395-2:2026 E

EN IEC/IEEE 62395-2:2026 (E)
European foreword
This document (EN IEC/IEEE 62395-2:2026) consists of the text of IEC/IEEE 62395-2:2024 prepared
by IEC/TC 27 "Industrial electroheating and electromagnetic processing".
The following dates are fixed:
• latest date by which this document has to be (dop) 2027-07-31
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards conflicting (dow) 2029-07-31
with this document have to be withdrawn
This document supersedes EN 62395-2:2013 and all of its amendments and corrigenda (if any).
This document is read in conjunction with EN IEC/IEEE 62395-1.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC/IEEE 62395-2:2024 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC/IEEE 60079-30-1 NOTE Approved as EN 60079-30-1
IEC/IEEE 60079-30-2 NOTE Approved as EN 60079-30-2
EN IEC/IEEE 62395-2:2026 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC/IEEE 62395-1 2024 Electrical resistance trace heating systems EN IEC/IEEE 2026
for industrial and commercial applications - 62395-1
Part 2: Application guide for system
design, installation and maintenance

IEC/IEEE 62395-2 ®
Edition 1.0 2024-06
INTERNATIONAL
STANDARD
colour
inside
Electrical resistance trace heating systems for industrial and commercial

applications –
Part 2: Application guide for system design, installation and maintenance

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.180.10 ISBN 978-2-8322-8826-9

– 2 – IEC/IEEE 62395-2:2024 © IEC/IEEE 2024
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 11
3 Terms and definitions . 11
4 Surface heating of vessels and piping systems . 11
4.1 Application description . 11
4.1.1 General . 11
4.1.2 Environmental conditions . 11
4.1.3 Trace heating systems considerations . 12
4.2 Design information – General . 12
4.2.1 General . 12
4.2.2 Electrical system design . 12
4.2.3 Control and monitoring . 13
4.2.4 Trace heating system design . 14
4.2.5 Design information documentation . 14
4.3 Thermal system design . 14
4.3.1 General . 14
4.3.2 Design conditions . 15
4.3.3 Thermal insulation . 15
4.3.4 Heat loss determination . 19
4.3.5 Design safety factor . 21
4.3.6 Heat-up considerations . 21
4.3.7 Selection of trace heater . 22
4.3.8 Design calculations . 25
4.3.9 Theoretical sheath temperature calculations – Metallic pipe applications . 25
4.3.10 Theoretical sheath temperature calculations – Non-metallic pipe
applications . 26
4.3.11 Design documentation . 27
4.3.12 Start-up at low ambient temperatures . 28
4.3.13 Long trace heater circuits . 28
4.3.14 Chimney effect . 28
4.4 Electrical design . 28
4.5 Control and monitoring system design . 29
4.5.1 General . 29
4.5.2 Mechanical temperature controllers . 29
4.5.3 Electronic temperature controllers . 29
4.5.4 Application suitability . 30
4.5.5 Location of controllers . 31
4.5.6 Location of sensors . 31
4.5.7 Alarm considerations . 32
4.5.8 Integrated control . 33
4.5.9 Flow pattern analysis . 33
4.5.10 Dead-leg control technique . 35
4.5.11 Monitoring requirements for fire sprinkler systems . 35
4.6 Special design considerations . 35
4.6.1 General . 35

IEC/IEEE 62395-2:2024 © IEC/IEEE 2024 – 3 –
4.6.2 Freeze protection systems . 35
4.6.3 Sprinkler systems, fire suppression. 36
4.6.4 Hot water services/tempered water . 37
4.6.5 Safety shower design requirements . 38
4.6.6 Specialty lines . 38
4.7 Installation . 40
4.7.1 General . 40
4.7.2 Personnel aspects . 40
4.7.3 Preparatory work . 41
4.7.4 Preliminary installation of trace heating circuits . 41
4.7.5 Pre-installation insulation resistance test . 41
4.7.6 Installation of trace heater systems . 42
4.7.7 Installation of control and monitoring equipment . 44
4.7.8 Necessary modifications . 45
4.7.9 Installation of the thermal insulation system . 45
4.7.10 Installation of electrical power . 47
4.7.11 Commissioning . 47
4.8 Maintenance . 48
4.8.1 General . 48
4.8.2 Training of maintenance personnel . 49
4.8.3 Frequency of inspection . 49
4.8.4 Maintenance program documentation . 49
4.8.5 Visual evaluation . 49
4.8.6 Electrical evaluation. 50
4.8.7 Review of the electrical protection system . 50
4.9 Repair . 50
4.9.1 General . 50
4.9.2 Fault location . 50
4.9.3 Practicability of repair to electric trace heaters . 51
4.9.4 Repair techniques for electrical trace heaters . 51
5 Roof and gutter deicing . 52
5.1 Application description . 52
5.2 Design information – General . 52
5.3 Thermal design . 53
5.4 Electrical design . 53
5.5 Control and monitoring system design . 53
5.6 Special design considerations . 54
5.7 Installation . 54
5.7.1 General . 54
5.7.2 Trace heaters and component mounting . 54
5.8 Maintenance . 57
5.9 Repair . 57
6 Rail heating . 57
6.1 Application description . 57
6.1.1 General . 57
6.1.2 Switch point heating9 . 58
6.1.3 Contact/live rail heating . 58
6.1.4 Track heating . 58
6.1.5 Catenary/pantograph shoe heating . 58

– 4 – IEC/IEEE 62395-2:2024 © IEC/IEEE 2024
6.2 Design information . 59
6.2.1 General . 59
6.2.2 Weather data . 59
6.2.3 Rail system description . 59
6.2.4 System design . 59
6.3 Thermal design . 60
6.3.1 Heating load determination . 60
6.3.2 Typical heating load . 60
6.4 Electrical design . 60
6.5 Control and monitoring system design . 60
6.6 Special design considerations . 61
6.6.1 Electrical considerations . 61
6.6.2 Finite element analysis . 61
6.7 Installation . 61
6.7.1 General . 61
6.7.2 Point heating . 62
6.7.3 Swing nose crossing . 62
6.7.4 Clamp lock heating . 63
6.7.5 Contact/live rail heating and track heating . 63
6.7.6 Catenary/pantograph shoe heating . 64
6.8 Maintenance . 64
6.9 Repair . 64
7 Snow melting . 64
7.1 Application description . 64
7.2 Design information . 65
7.2.1 General . 65
7.2.2 Weather data . 65
7.2.3 Construction details of workpiece . 65
7.2.4 Electrical considerations . 65
7.2.5 System performance level . 65
7.2.6 Trace heater layout and component mounting . 66
7.3 Thermal design – Power output (heat load) determination . 69
7.4 Electrical design . 70
7.5 Control and monitoring system design . 70
7.6 Special design considerations . 70
7.7 Installation . 71
7.8 Maintenance . 71
7.9 Repair . 71
8 Floor warming . 72
8.1 Application description . 72
8.2 Design information . 72
8.2.1 General . 72
8.2.2 Environmental data . 72
8.2.3 Construction details of workpiece . 72
8.2.4 Electrical considerations . 72
8.2.5 Trace heater layout and component mounting . 72
8.3 Thermal design – Heat load determination . 74
8.4 Electrical design . 75
8.5 Control and monitoring system design . 75

IEC/IEEE 62395-2:2024 © IEC/IEEE 2024 – 5 –
8.6 Special design consideration . 75
8.7 Installation . 76
8.8 Maintenance . 76
8.9 Repair . 76
9 Frost heave prevention . 76
9.1 Application description . 76
9.2 Design information . 77
9.2.1 General . 77
9.2.2 Construction details of the floor . 77
9.2.3 Electrical considerations . 77
9.3 Heat load determination . 77
9.3.1 General . 77
9.3.2 Trace heater layout and component mounting . 79
9.4 Electrical design . 79
9.5 Control and monitoring system design . 79
9.5.1 Control options . 79
9.5.2 Monitoring . 79
9.6 Special design considerations . 79
9.7 Installation . 80
9.8 Maintenance . 80
9.9 Repair . 80
10 Underground thermal energy storage systems . 80
10.1 Application description . 80
10.2 Design information . 81
10.2.1 General . 81
10.2.2 Environmental data . 81
10.2.3 Construction details of building . 81
10.2.4 Electrical considerations . 81
10.2.5 Trace heater layout and component mounting . 81
10.3 Thermal design – Heat-loss determination . 82
10.4 Electrical design . 82
10.5 Control and monitoring system design . 82
10.6 Special design considerations when trace heaters are located in sand layer . 83
10.7 Installation . 83
10.7.1 General . 83
10.7.2 Installation in sand . 83
10.7.3 Installation in concrete . 83
10.8 Maintenance . 84
10.9 Repair . 84
Annex A (informative) Pre-installation checks . 85
Annex B (informative) Trace heater commissioning record . 86
Annex C (informative) Maintenance schedule and log record . 87
Bibliography . 88

Figure 1 – Thermal insulation – Weather-barrier installation . 17
Figure 2 – Typical temperature profile . 19
Figure 3 – Equilibrium conditions for workpiece maintenance . 24

– 6 – IEC/IEEE 62395-2:2024 © IEC/IEEE 2024
Figure 4 – Equilibrium conditions for upper limit evaluation . 24
Figure 5 – Heated tank example . 34
Figure 6 – Bypass example . 34
Figure 7 – Fire sprinkler sprig: tapered thermal insulation . 37
Figure 8 – Double containment system . 39
Figure 9 – Gravity flow piping systems . 40
Figure 10 – Ice dam formation . 52
Figure 11 – Downspout to underground drain . 53
Figure 12 – Roof and gutter trace heater arrangement . 55
Figure 13 – Gutter detail . 55
Figure 14 – Typical roof mounting methods . 56
Figure 15 – Drain detail for flat roof. 57
Figure 16 – Typical positioning of point trace heater on stock rail and switch rail . 62
Figure 17 – Typical positioning of trace heater on swing nose crossing . 62
Figure 18 – Typical clamp lock trace heater . 63
Figure 19 – Typical positioning of trace heater on steel and aluminium clad contact rails . 63
Figure 20 – Typical positioning of trace heater in pantograph shoe . 64
Figure 21 – Snow melting trace heater embedded in concrete. 67
Figure 22 – Snow melting trace heater located in conduit . 68
Figure 23 – Expansion joint detail . 69
Figure 24 – Snow melting junction box location . 69
Figure 25 – Typical floor warming trace heater mounting . 74
Figure 26 – Typical floor heating power requirements . 75
Figure 27 – Typical frost heave prevention substructure . 77
Figure 28 – Frost heave prevention power requirements . 78
Figure 29 – Typical underground thermal energy storage system installation . 82

Table 1 – Trace heater and surface heater types and related attributes . 10
Table 2 – Application types . 13
Table 3 – Recommendations for monitoring and control – Type II and III control . 31
Table 4 – Recommendations for hot water services and tempered water temperatures . 37
Table 5 – Minimum values of Insulation resistance. 42
Table 6 – Typical snow melting heat loads . 66

IEC/IEEE 62395-2:2024 © IEC/IEEE 2024 – 7 –
ELECTRICAL RESISTANCE TRACE HEATING SYSTEMS
FOR INDUSTRIAL AND COMMERCIAL APPLICATIONS –

Part 2: Application guide for system design, installation and maintenance

FOREWORD
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– 8 – IEC/IEEE 62395-2:2024 © IEC/IEEE 2024
This document is published as an IEC/IEEE Dual Logo standard.
This standard cancels and replaces IEC 62395-2:2013. This edition constitutes a technical
revision.
This standard includes the following significant technical changes with respect to
IEC 62395-2:2013:
a) Design considerations for trace heating on sprinkler systems have been expanded and a
figure has been added to illustrate how to avoid undue shadowing of spray patterns from
insulated sprigs close to sprinkler heads;
b) Specific details of design considerations for trace heating for emergency eyewash units and
safety showers have been added.
The text of this International Standard is based on the following IEC documents:
Draft Report on voting
27/1183/FDIS 27/1185/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with the rules given in the ISO/IEC Directives, Part 2,
available at www.iec.ch/members_experts/refdocs. The main document types developed by IEC
are described in greater detail at www.iec.ch/publications/.
This standard is intended to be used in conjunction with IEC/IEEE 62395-1.
A list of all parts in the IEC 62395 series, under the general title Electrical resistance trace
heating systems for industrial and commercial applications, can be found on the IEC website.
The IEC Technical Committee and IEEE Technical Committee have decided that the contents
of this document will remain unchanged until the stability date indicated on the IEC website
under webstore.iec.ch in the data related to the specific document. At this date, the document
will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

IEC/IEEE 62395-2:2024 © IEC/IEEE 2024 – 9 –
INTRODUCTION
IEC/IEEE 62395-1 provides the essential requirements and testing appropriate to electrical
resistance trace heating equipment used in industrial and commercial applications. While some
of this work already exists in national or international standards, this document has collated
much of this existing work and added considerably to it.
IEC/IEEE 62395-2 provides detailed recommendations for the system design, installation,
maintenance and repair of electrical resistance trace heating systems in industrial and
commercial applications which can include piping, vessels, roofs and concrete slab heating
applications.
It is the objective of the IEC/IEEE 62395 series that, when in normal use, electrical trace heating
systems operate safely under their defined conditions of use, by
a) employing heaters of the appropriate construction so as to meet the test criteria and
requirements detailed in IEC/IEEE 62395-1. The construction includes a metallic sheath,
braid, screen or equivalent electrically conductive covering;
b) operating at safe temperatures when designed, installed, and maintained in accordance with
IEC/IEEE 62395-2;
c) having at least the minimum levels of overcurrent and earth-fault protection required in
IEC/IEEE 62395-1 and IEC/IEEE 62395-2.

– 10 – IEC/IEEE 62395-2:2024 © IEC/IEEE 2024
ELECTRICAL RESISTANCE TRACE HEATING SYSTEMS
FOR INDUSTRIAL AND COMMERCIAL APPLICATIONS –

Part 2: Application guide for system design, installation and maintenance

1 Scope
This part of IEC/IEEE 62395 provides detailed recommendations for the system design,
installation, maintenance and repair of electrical resistance trace heating systems in industrial
and commercial applications. This document does not include or provide for any applications in
potentially explosive atmospheres.
This document pertains to trace heating systems that can comprise either factory fabricated or
field-assembled (work-site) units, and which can 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.
The products covered by this document are intended to be installed by persons who are suitably
trained in the techniques required and that only trained personnel carry out especially critical
work, such as the installati
...