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BS EN IEC 60079-17:2024 – TC

BS EN IEC 60079-17:2024 – TC

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Tracked Changes. Explosive atmospheres – Electrical installations inspection and maintenance

Published By Publication Date Number of Pages
BSI 2024 110
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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.

PDF Catalog

PDF Pages PDF Title
60 undefined
63 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
64 English
CONTENTS
67 FOREWORD
71 INTRODUCTION
72 1 Scope
2 Normative references
73 3 Terms and definitions
74 4 General requirements
4.1 Documentation
75 4.2 Competence of personnel
4.3 Integrated systems
4.4 Inspections
4.4.1 General
77 4.4.2 Grades of inspection
4.4.3 Types of inspection
78 4.5 Periodic inspections
4.5.1 Personnel
4.5.2 Fixed installations
79 4.5.3 Transportable, personal and portable equipment
4.6 Continuous supervision
4.6.1 Concept
4.6.2 Objectives
80 4.6.3 Responsibilities
4.6.4 Frequency of inspection
81 4.6.5 Documents
4.6.6 Training
4.7 Maintenance requirements
4.7.1 Remedial measures and modifications to equipment
82 4.7.2 Maintenance of flexible cables
4.7.3 Withdrawal from service
4.7.4 Fastenings and tools
4.8 External influences
83 4.9 Isolation of equipment
4.9.1 Installations other than intrinsically safe circuits
84 4.9.2 Live maintenance on Intrinsically safe installations
85 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
86 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
87 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
88 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
89 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
90 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
91 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
92 Table 1 ā€“ Inspection schedule for Ex “d”, Ex “e”, Ex “n” and Ex “t/tD” installations
94 Table 2 ā€“ Inspection schedule for Ex “i” installations
95 Table 3 ā€“ Inspection schedule for Ex “p” and “pD” installations
96 Table 4 ā€“ Inspection schedule for Ex “o” installations
98 Annex A (informative) Typical inspection procedure for periodic inspections
Figure A.1 ā€“ Typical inspection procedure for periodic inspections
99 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)
100 B.3 Competencies
B.3.1 General
B.3.2 Technical Persons with Executive Function
B.3.3 Skilled Personnel
B.4 Assessment
101 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
102 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
103 C.5.8 Documents
C.5.9 Product sample
C.5.10 Equipment label
C.5.11 Training of personnel
104 C.5.12 Elements of the report
C.5.13 Assessor requirements
C.5.14 Typical assessment and test report
105 Table C.1 ā€“ Example of a typical assessment and test report
106 Annex D (informative) Example of motor checks
107 Annex E (informative) Adverse service conditions
108 Bibliography

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BS EN IEC 60079-17:2024 - TC
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