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BS EN IEC 60079-17:2024

BS EN IEC 60079-17:2024

$198.66

Explosive atmospheres – Electrical installations inspection and maintenance

Published By Publication Date Number of Pages
BSI 2024 52
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This part of the IEC 60079 series applies to users and covers only those factors directly related to the inspection and maintenance of electrical installations specifically designed for hazardous areas, where the hazard may be caused by explosive gas or explosive dust atmospheres. It does not include: – other fundamental installation and inspection requirements for electrical installations; – the verification of electrical equipment; – protection or ventilation of rooms; – gas detection systems; – the repair and overhaul of explosion protected equipment (see IEC 60079-19). While this standard does not include inspection of safety devices such as used in ventilated rooms (see 60079-13), this standard does include the requirements for inspection and maintenance of individual items of equipment that will be part of such systems, for example motors or sensors. This standard supplements the requirements for inspection and testing in non-hazardous areas in IEC 60364-6. NOTE 1 Standards applied at the date of installation might not have been IEC standards. This standard is intended to be applied where there can be a risk due to the presence of explosive gas or dust mixtures with air or combustible dust layers under normal atmospheric conditions. It does not apply to: – underground mining areas, – dusts of explosives, – pyrophoric substances.

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PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 English
CONTENTS
9 FOREWORD
13 INTRODUCTION
14 1 Scope
2 Normative references
15 3 Terms and definitions
16 4 General requirements
4.1 Documentation
17 4.2 Competence of personnel
4.3 Integrated systems
4.4 Inspections
4.4.1 General
19 4.4.2 Grades of inspection
4.4.3 Types of inspection
20 4.5 Periodic inspections
4.5.1 Personnel
4.5.2 Fixed installations
21 4.5.3 Transportable, personal and portable equipment
4.6 Continuous supervision
4.6.1 Concept
4.6.2 Objectives
22 4.6.3 Responsibilities
4.6.4 Frequency of inspection
23 4.6.5 Documents
4.6.6 Training
4.7 Maintenance requirements
4.7.1 Remedial measures and modifications to equipment
24 4.7.2 Maintenance of flexible cables
4.7.3 Withdrawal from service
4.7.4 Fastenings and tools
4.8 External influences
25 4.9 Isolation of equipment
4.9.1 Installations other than intrinsically safe circuits
26 4.9.2 Live maintenance on Intrinsically safe installations
27 4.10 Earthing and equipotential bonding
4.11 Specific Conditions of Use
4.12 Movable equipment and its connections
4.13 Inspection schedules
4.13.1 General
4.13.2 Equipment is appropriate to the EPL/Zone requirements of the location
28 4.13.3 Equipment group
4.13.4 Equipment maximum surface temperature
4.13.5 Equipment circuit identification
4.13.6 Ex Cable Glands
4.13.7 Type of cable
4.13.8 Sealing
4.13.9 Test and measuring equipment
4.13.10 Fault loop impedance or earthing resistance
29 4.13.11 Insulation resistance
4.13.12 Overload protection
4.13.13 Lamps and luminaires
5 Additional inspection schedule requirements
5.1 Type of Protection “d” ā€“ Flameproof enclosure
30 5.2 Type of Protection “e” ā€“ Increased safety
5.2.1 Level of Protection “eb”
5.2.2 Level of Protection “ec”
5.3 Type of Protection “i” ā€“ Intrinsic safety
5.3.1 General
31 5.3.2 Documentation
5.3.3 Labelling
5.3.4 Unauthorized modifications
5.3.5 Associated apparatus (safety interface) between intrinsically safe and non-intrinsically safe circuits
5.3.6 Cables
5.3.7 Cable screens
5.3.8 Point-to-point connections
32 5.3.9 Earth continuity of non-galvanically isolated circuits
5.3.10 Earth connections to maintain the integrity of the intrinsic safety
5.3.11 Intrinsically safe circuit earthing or insulation
5.3.12 Separation between intrinsically safe and non-intrinsically safe circuits
5.4 Type of Protection “p” and “pD” ā€“ Pressurized enclosure
33 5.5 Type of Protection “n”
5.5.1 General
5.5.2 Restricted breathing enclosures
5.6 Type of Protection “t” and “tD” ā€“ Protection by enclosure
5.7 Types of Protection “o” (liquid immersion)
5.8 Types of Protection “m” and “mD” (encapsulation), “op” (optical radiation) and “q” (powder-filling)
6 Inspection tables
34 Table 1 ā€“ Inspection schedule for Ex “d”, Ex “e”, Ex “n” and Ex “t/tD” installations
36 Table 2 ā€“ Inspection schedule for Ex “i” installations
37 Table 3 ā€“ Inspection schedule for Ex “p” and “pD” installations
38 Table 4 ā€“ Inspection schedule for Ex “o” installations
40 Annex A (informative) Typical inspection procedure for periodic inspections
Figure A.1 ā€“ Typical inspection procedure for periodic inspections
41 Annex B (normative) Knowledge, skills and competencies of Technical Persons with Executive Function and Skilled Personnel
B.1 General
B.2 Knowledge and skills
B.2.1 Technical Persons with Executive Function
B.2.2 Skilled Personnel (inspection and maintenance)
42 B.3 Competencies
B.3.1 General
B.3.2 Technical Persons with Executive Function
B.3.3 Skilled Personnel
B.4 Assessment
43 Annex C (informative) Fitness-for-purpose assessment
C.1 Background
C.2 Need for a fitness-for-purpose assessment
C.3 Approach
C.4 Ignition sources
C.5 Contents of the fitness-for-purpose assessment
C.5.1 General
C.5.2 Scope of the assessment report
44 C.5.3 Equipment and its application
C.5.4 Description
C.5.5 Function of the product including the location
C.5.6 Specification
C.5.7 Standards compliance
45 C.5.8 Documents
C.5.9 Product sample
C.5.10 Equipment label
C.5.11 Training of personnel
46 C.5.12 Elements of the report
C.5.13 Assessor requirements
C.5.14 Typical assessment and test report
47 Table C.1 ā€“ Example of a typical assessment and test report
48 Annex D (informative) Example of motor checks
49 Annex E (informative) Adverse service conditions
50 Bibliography

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BS EN IEC 60079-17:2024
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