This part of IEC 60079 specifies general and testing requirements for electrical resistance trace heaters for application in explosive atmospheres with the exclusion of those for EPL Ga and Da. This standard covers trace heaters that comprise either factory or field (work-site) assembled units, and which may be series trace heaters, parallel trace heaters, trace heater pads, or trace heater panels that have been assembled and/or terminated in accordance with the manufacturer’s instructions.

This standard also includes requirements for termination assemblies and control methods used with trace heating systems. The explosive atmospheres referred to in this standard are those defined in IEC 60079-10-1 and IEC 60079-10-2 .

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This standard supplements and modifies the general requirements of IEC 60079-0 , except as indicated in Table 1. Where a requirement of this standard conflicts with a requirement of IEC 60079-0 , the requirement of this standard takes precedence.

Table 1

Application or exclusion of specific clauses of IEC 60079-0

NOTE 1

Clause numbers in the three right-hand columns of this table refer to IEC/IEEE 60079-30-1

NOTE 2

The clause number in the above table is shown for information only. The applicable requirements of IEC 60079-0 are identified by the clause title which is normative.

Applies: this requirement of IEC 60079-0 is applied without change.

Excluded: this requirement of IEC 60079-0 does not apply.

Modified: this requirement of IEC 60079-0 is modified as detailed in this standard.

5.1.1	Ambient temperature
Publication Date	2017-07-31
5.3.2.3.2	Group III electrical equipment Maximum surface temperature with respect to dust layers
5.3.2.3.1	Group III electrical equipment, Maximum surface temperature determined without a dust layer
7.1.2.2	Specification of materials, plastic materials
7.1.2.3	Elastomers
6.6	Electromagnetic and ultrasonic radiating equipment
6.5	Gasket retention
7.1.2.1	Specification of materials, General
6.4	Circulating currents in enclosures (e.g. of large electrical machines)
5.1.2	External source of heating or cooling
5.3.2.2	Group II electrical equipment
Title	Explosive atmospheres – Electrical resistance trace heating. General and testing requirements
5.1	Environmental influences
6.1	Requirements for all electrical equipment — General
26.5.3	Small component ignition test
26.5.2	Thermal shock test
26.5.1	Temperature measurement
Publisher	BSI
Replaces	BS EN 60079-30-1:2007
7.1.1	Non-metallic enclosures and non-metallic parts of enclosures — Applicability
Modified National Standard Of	IEC/IEEE 60079-30-1:2015
30	Instructions
5.2	Service temperature
5.3.2.1	Group I electrical equipment
6.2	Mechanical strength
Committee	EXL/31
8.4	Group III
8.3	Group II
5.3.1	Determination of maximum surface temperature
8.2	Group I
8.1	Material composition
4.4	Equipment for a particular explosive atmosphere
4.3	Group III
4.2	Group II
4.1	Group I
7.4.3	Avoidance of a build-up of electrostatic charge on equipment for Group III
5.3.3	Small component temperature for Group I and Group II electrical equipment
7.4.1	Electrostatic charges on external non-metallic materials, Applicability
7.4.2	Avoidance of a build-up of electrostatic charge on Group I or Group II electrical equipment
Identical National Standard Of	EN 60079-30-1:2017, IEC/IEEE 60079-30-1:2015
26.15	Verification of ratings of ventilating fans
26.16	Alternative qualification of elastomeric sealing O-rings
26.13	Surface resistance test of parts of enclosures of non-metallic materials
ISBN	978 0 580 79820 7
26.14	Measurement of capacitance
26.11	Resistance to chemical agents for Group I electrical equipment
26.12	Earth continuity
26.10	Resistance to light
Descriptors	Test methods, Pipes, Heating equipment, Industrial, Electrical heating elements, Electric cables, Trace heating systems, Electric heaters, Heaters, Electrical resistance, Electrical safety, Protected electrical equipment, Electrical equipment, Explosive atmospheres
Standard Number	BS EN 60079-30-1:2017
6.3	Opening times
10	Interlocking devices
26.2	Test configuration
26.4.3	Drop test
26.4.1.1	Metallic enclosures, metallic parts of enclosures and glass parts of enclosures
19	Supplementary requirements for fuses
18	Supplementary requirements for switchgear
17	Supplementary requirements for rotating electrical machines
15	Entries into enclosures
14	Connection facilities and termination compartments
13	Ex Components
12	Materials used for cementing
Status	Revision Underway
29	Marking
11	Bushings
26.4.2	Resistance to impact
26.3	Tests in explosive test mixtures
26.4	Tests of enclosures
26.5	Thermal tests
26.6	Torque test for bushings
26.7	Non-metallic enclosures or non-metallic parts of enclosures
26.8	Thermal endurance to heat
26.9	Thermal endurance to cold
26.1	General
	sample with documents
26.4.1.2	Non-metallic enclosures or non-metallic parts of enclosures
7.5	Accessible metal parts
9	Fasteners
7.3	Resistance to light
26.4.1	Order of tests
27	Routine tests
25	Compliance of prototype or
24	Documentation
23	Equipment incorporating cells and batteries
22	Supplementary requirements for caplights and handlights
Annex D	Motors supplied by converters
21	Supplementary requirements for luminaires
Annex E	Guideline flowchart for tests of non-metallic enclosures or non-metallic parts of enclosures (26.4)
20	Supplementary requirements for plugs and sockets
26.4.4	Acceptance criteria
ICS Codes	29.260.20 - Electrical apparatus for explosive atmospheres
28	Manufacturers responsibility
7.2	Thermal endurance
4	Equipment grouping
3	Terms and definitions
Annex A	Supplementary requirements for Ex cable glands
2	Normative references
Annex B	Requirements for Ex components
26.4.5	Degree of protection by enclosure
1	Scope
Pages	74
Annex C	Example of rig for resistance to impact test


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BS EN 60079-30-1:2017

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BS EN 60079-30-1:2017 – TC:2020 Edition