EN IEC/IEEE 62395-2:2026

• Abstract:

  IEC/IEEE 62395-2:2024 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 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.

• Status: Published
• Publication Date: 02-Jul-2026
• ICS: 25.180.10 - Electric furnaces
• Technical Committee: CLC/SR 27 - Industrial electroheating equipment
• Drafting Committee: CLC/SR 27 - Industrial electroheating equipment
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 03-Jul-2026
• Due Date: 11-Jan-2028
• Completion Date: 03-Jul-2026
• Ref Project: 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)

• Replaces: EN 62395-2:2013 - Electrical resistance trace heating systems for industrial and commercial applications - Part 2: Application guide for system design, installation and maintenance
• Effective Date: 02-Sep-2025
• Referred By: EN 60519-10:2013 - Safety in electroheating installations - Part 10: Particular requirements for electrical resistance trace heating systems for industrial and commercial applications
• Effective Date: 07-Jul-2026
• Referred By: EN IEC 62395-1:2026 - Electrical resistance trace heating systems for industrial and commercial applications - Part 1: General and testing requirements
• Effective Date: 03-Feb-2026

Overview

EN IEC/IEEE 62395-2:2026 is a comprehensive application guide for the design, installation, maintenance, and repair of electrical resistance trace heating systems used in industrial and commercial settings. Developed by the European Committee for Electrotechnical Standardization (CLC), this standard provides practical recommendations and updated procedures for ensuring reliable, efficient, and safe operation of trace heating systems-excluding those for use in potentially explosive atmospheres.

This new edition cancels and replaces IEC 62395-2:2013 and introduces several technical revisions, including expanded guidance on sprinkler systems and new content for emergency eyewash units and safety showers. EN IEC/IEEE 62395-2:2026 is intended for use by system designers, installers, engineers, and maintenance personnel working with electrical heat tracing in industrial plants, commercial buildings, and related infrastructure.

Key Topics

• System Design: Outlines essential considerations for designing trace heating systems, including assessment of environmental conditions, thermal insulation, heat loss calculations, safety factors, circuit length, and selection of heaters.
• Sprinkler System Trace Heating: Provides detailed design guidelines, with updated figures to help avoid shadowing of sprinkler spray patterns and maintain system effectiveness and safety.
• Special Applications: Includes new and specific recommendations for trace heating in emergency eyewash units and safety showers to ensure proper operation in cold environments.
• Electrical Design: Covers electrical system planning, circuit protection, control, monitoring, and documentation requirements.
• Installation Procedures: Defines steps for preparatory work, installation, insulation resistance testing, commissioning, thermal insulation, and power supply integration.
• Maintenance & Repair: Details maintenance frequency, documentation requirements, training for maintenance staff, visual and electrical evaluations, and standard procedures for locating and repairing faults in trace heating systems.
• Application-Specific Sections: Addresses trace heating for surface heating of vessels, piping, roof and gutter de-icing, rail heating, snow melting, floor warming, frost heave prevention, and underground thermal energy storage systems.

Applications

EN IEC/IEEE 62395-2:2026 is widely applicable across multiple sectors, particularly where freeze protection, temperature maintenance, or process heating is required:

• Industrial Facilities: Chemical plants, food processing, oil and gas facilities require heat tracing for process pipes, tanks, and specialty lines to maintain fluidity and prevent freezing.
• Commercial Buildings: Trace heating systems are used for domestic hot water, fire sprinkler systems, and roof/gutter de-icing to prevent damage from ice or frost.
• Safety Systems: Maintaining the proper temperature for emergency eyewash units and safety showers is critical for compliance with health and safety regulations.
• Transportation: Rail heating applications ensure switch points and live rails remain operational during freezing conditions.
• Infrastructure: Snow melting systems for driveways, walkways, floors, and underground energy storage installations benefit from standardized design and maintenance procedures.

Related Standards

EN IEC/IEEE 62395-2:2026 should be used in conjunction with, or with reference to, relevant international and European standards:

• EN IEC/IEEE 62395-1: Electrical resistance trace heating systems - General and testing requirements
• EN 60079-30-1 & EN 60079-30-2: Equipment and requirements for electrical resistance trace heating in potentially explosive atmospheres (not covered in 62395-2:2026)
• Other CLC, IEC, and IEEE standards in the fields of electrical heating, installation practices, and electrical safety

Practical Value

Adopting EN IEC/IEEE 62395-2:2026 ensures that industrial and commercial facilities implement up-to-date best practices for trace heating, reducing the risk of system failure, enhancing energy efficiency, and ensuring compliance with international safety guidelines. The standard provides a structured approach for system lifecycle management-from initial design through ongoing maintenance and repair-delivering value to facility operators and engineering professionals aiming to optimize heat tracing solutions for critical infrastructure. By following this guidance, organizations can achieve more reliable operations, reduced downtime, and greater safety for personnel and assets.

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

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
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
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in
addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC document(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation.
IEEE Standards documents are developed within IEEE Societies and Standards Coordinating Committees of the
IEEE Standards Association (IEEE SA) Standards Board. IEEE develops its standards through a consensus
development process, approved by the American National Standards Institute, which brings together volunteers
representing varied viewpoints and interests to achieve the final product. Volunteers are not necessarily members
of IEEE and serve without compensation. While IEEE administers the process and establishes rules to promote
fairness in the consensus development process, IEEE does not independently evaluate, test, or verify the
accuracy of any of the information contained in its standards. Use of IEEE Standards documents is wholly
voluntary. IEEE documents are made available for use subject to important notices and legal disclaimers (see
https://standards.ieee.org/ipr/disclaimers.html for more information).
IEC collaborates closely with IEEE in accordance with conditions determined by agreement between the two
organizations. This Dual Logo International Standard was jointly developed by the IEC and IEEE under the terms
of that agreement.
2) The formal decisions of IEC on technical matters express, as nearly as possible, an international consensus of
opinion on the relevant subjects since each technical committee has representation from all interested IEC
National Committees. The formal decisions of IEEE on technical matters, once consensus within IEEE Societies
and Standards Coordinating Committees has been reached, is determined by a balanced ballot of materially
interested parties who indicate interest in reviewing the proposed standard. Final approval of the IEEE standards
document is given by the IEEE Standards Association (IEEE SA) Standards Board.
3) IEC/IEEE Publications have the form of recommendations for international use and are accepted by IEC National
Committees/IEEE Societies in that sense. While all reasonable efforts are made to ensure that the technical
content of IEC/IEEE Publications is accurate, IEC or IEEE cannot be held responsible for the way in which they
are used or for any misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
(including IEC/IEEE Publications) transparently to the maximum extent possible in their national and regional
publications. Any divergence between any IEC/IEEE Publication and the corresponding national or regional
publication shall be clearly indicated in the latter.
5) IEC and IEEE do not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC and IEEE are not responsible
for any services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or IEEE or their directors, employees, servants or agents including individual
experts and members of technical committees and IEC National Committees, or volunteers of IEEE Societies and
the Standards Coordinating Committees of the IEEE Standards Association (IEEE SA) Standards Board, for any
personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for
costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC/IEEE
Publication or any other IEC or IEEE Publications.
8) Attention is drawn to the normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that implementation of this IEC/IEEE Publication may require use of material
covered by patent rights. By publication of this standard, no position is taken with respect to the existence or
validity of any patent rights in connection therewith. IEC or IEEE shall not be held responsible for identifying
Essential Patent Claims for which a license may be required, for conducting inquiries into the legal validity or
scope of Patent Claims or determining whether any licensing terms or conditions provided in connection with
submission of a Letter of Assurance, if any, or in any licensing agreements are reasonable or non-discriminatory.
Users of this standard are expressly advised that determination of the validity of any patent rights, and the risk
of infringement of such rights, is entirely their own responsibility.
IEC/IEEE 62395-2 was prepared by IEC technical committee 27: Industrial electroheating and
electromagnetic, in cooperation with the Petroleum & Chemical Industry Committee of the IEEE
Industrial Applications Society, under the IEC/IEEE Dual Logo Agreement between IEC and
IEEE. It is an International Standard.

– 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
...