This part of ISO/IEC80079 specifies the basic method and requirements for design, construction, testing and marking of non-electrical Ex equipment, Ex Components, protective systems, devices and assemblies of these products that have their own potential ignition sources and are intended for use in explosive atmospheres. Hand tools and manually operated equipment without energy storage are excluded from the scope of this standard. This standard does not address the safety of static autonomous process equipment when it is not part of equipment referred to in this standard. NOTE1 Static autonomous process equipment includes items such as tanks, vessels, fixed pipework and hand operated valves which do not have their own source of energy that could create a potential ignition source during operation. This standard does not specify requirements for safety, other than those directly related to the risk of ignition which may then lead to an explosion. The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it may be assumed that equipment can be operated are: temperature -20°C to+60°C; pressure 80kPa (0,8 bar) to 110kPa (1,1 bar); and air with normal oxygen content, typically 21%v/v. Such atmospheres can also exist inside the equipment. In addition, the external atmosphere can be drawn inside the equipment by natural breathing produced as a result of fluctuations in the equipment’s internal operating pressure, and/or temperature. NOTE2 Although the standard atmospheric conditions above give a temperature range for the atmosphere of - 20°C to+60°C, the normal ambient temperature range for the equipment is -20°C to+40°C, unless otherwise specified and marked. It is considered that -20°C to+40°C is appropriate for most equipment and that to manufacture all equipment to be suitable for a standard atmosphere upper ambient temperature of+60°C would place unnecessary design constraints. NOTE3 The requirements of this standard can also be helpful for the design, construction, testing and marking of equipment intended for use in atmospheres outside the validity range stated above. In this case however, the ignition hazard assessment, ignition protection provided, additional testing (if necessary), manufacturer’s technical documentation and instructions to the user, clearly demonstrate and indicate the equipment’s suitability for the conditions it may encounter. It is also recognized that changes in temperature and pressure can have a significant influence on characteristics of the explosive atmosphere, such as ignitability. This part of ISO/IEC80079 specifies the requirements for the design and construction of equipment, intended for explosive atmospheres in conformity with all Equipment Protection Levels (EPLs) of Group I, II and III. NOTE4 It is not unusual for equipment designed and constructed in accordance with this standard for a particular EPL to be used in areas requiring an EPL with a higher level of safety by including the application of additional measures. Such measures include for example inerting, suppression, venting or containment or for example by dilution, drainage, monitoring and shut-down. Such measures are outside the scope of this standard. This standard supplements and modifies the general requirements of IEC60079‑0 , as shown in Table1. Where a requirement of this standard conflicts with a requirement of IEC60079‑0 , as far as applicable for non-electrical equipment, the requirement of this standard takes precedence. This standard is supplemented or modified by the following standards concerning specific types of protection: ISO80079‑37 , Explosive atmospheres– Part37: Non-electrical equipment for explosive atmospheres– Non-electrical type of protection constructional safety \'c\', control of ignition source \'b\', liquid immersion \'k\' IEC60079‑1 , Explosive atmospheres— Part1: Equipment protection by flameproof enclosures \'d\' IEC60079‑2 , Explosive atmospheres— Part2: Equipment protection by pressurized enclosures \'p\' IEC60079‑31 , Explosive atmospheres— Part31: Equipment dust ignition protection by enclosure \'t\' The nature and ignition sources of non-electrical equipment shall be considered when applying types of protection \'d\', \'p\', or \'t\' on non-electrical equipment (see AnnexG). Table1 Applicability of specific clauses of IEC60079-0 Clause of IEC60079‑0 IEC60079‑0 application to Ed 6.0 (2011) (Inf.) Clause/Sub-Clause Title (Normative) ISO80079‑36 ISO80079‑37 \'c\' \'b\' \'k\' 4 Equipment grouping Modified (see Clause4) (*) (*) (*) 4.1 Group I Applies (*) (*) (*) 4.2 Group II Applies (*) (*) (*) 4.3 Group III Modified (see 4.4) (*) (*) (*) 4.4 Equipment for a particular explosive atmosphere Applies (*) (*) (*) 5 Temperatures Modified (see 6.2 and Table2) (*) (*) (*) 5.1 Environmental influences Applies (*) (*) (*) 5.1.1 Ambient temperature Applies to be read as nonelectrical equipment (*) (*) (*) 5.1.2 External source of heating or cooling Applies to be read as nonelectrical equipment (*) (*) (*) 5.2 Service temperature Applies to be read as nonelectrical equipment (*) (*) (*) 5.3.1 Determination of maximum surface temperature Modified (see 6.2.3) non-electrical (*) (*) (*) 5.3.2.1 Group I electrical equipment Modified (see 6.2.4) non-electrical (*) (*) (*) 5.3.2.2 Group II electrical equipment Modified (see 6.2.5) non-electrical (*) (*) (*) 5.3.2.3 Group III electrical equipment Modified (see 6.2.7) non-electrical (*) (*) (*) 5.3.3 Small component temperature for Group I and Group II electrical equipment Modified (see 6.2.6) non-electrical (*) (*) (*) 6. Requirements for all electrical equipment Applies to be read as nonelectrical equipment (*) (*) (*) 6.1 General Applies to be read as nonelectrical equipment (*) (*) (*) 6.2 Mechanical strength of equipment Applies (*) (*) (*) 6.3 Opening times Modified (see 7.3) (*) (*) (*) 6.4 Circulating currents in enclosures (e.g. of large electrical machines) Applies (*) (*) (*) 6.5 Gasket retention Applies (*) (*) (*) 6.6 Electromagnetic and ultrasonic energy radiating equipment Excluded — — — 7 Non-metallic enclosures and nonmetallic parts of enclosures Applies (*) (*) (*) 7.1 General Applies (*) (*) (*) 7.1.1 Applicability Applies (*) (*) (*) 7.1.2 Specification of materials Applies (*) (*) (*) 7.2 Thermal endurance Applies (*) (*) (*) 7.3 Resistance to light Applies (*) (*) (*) 7.4 Electrostatic charges on external non-metallic materials Modified (see 6.7.4, 6.7.5 and 6.7.6) (*) (*) (*) 7.5 Accessible metal parts Applies (*) (*) (*) 8 Metallic enclosures and metallic parts of enclosures Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 8.1 Material composition Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 8.2 Group I Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 8.3 Group II Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 8.4 Group III Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 9 Fasteners Excluded — — — 10 Interlocking devices Excluded — — — 11 Bushings Excluded — — — 12 Materials used for cementing Applies (see 7.6) (*) (*) (*) 13 Ex Components Applies (*) (*) (*) 14 Connection facilities and termination compartments Excluded — — — 15 Connection facilities for earthing or bonding conductors Excluded — — — 16 Entries into enclosures Excluded — — — 17 Supplementary requirements for rotating machines Excluded — — — 18 Supplementary requirements for switchgear Excluded — — — 19 Supplementary requirements for fuses Excluded — — — 20 Supplementary requirements for plugs, socket outlets and connectors Excluded — — — 21 Supplementary requirements for luminaires Excluded — — — 22 Supplementary requirements for caplights and handlights Excluded — — — 23 Equipment incorporating cells and batteries Excluded — — — 24 Documentation Modified (see 9) (*) (*) (*) 25 Compliance of prototype or sample with documents Applies (*) (*) (*) 26 Type Tests Modified (see 8) (*) (*) (*) 26.1 General Applies (*) (*) (*) 26.2 Test configuration Applies to be read as nonelectrical equipment (*) (*) (*) 26.3 Tests in explosive test mixtures Applies (*) (*) (*) 26.4.1 Order of tests Excluded — — — 26.4.2 Resistance to impact Applies (see 8.3.1) (*) (*) (*) 26.4.3 Drop test Applies (see 8.3.2) (*) (*) (*) 26.4.4 Acceptance criteria Applies (see 8.3.3 (*) (*) (*) 26.4.5 Degree of protection (IP) by enclosure Applies (*) (*) (*) 26.5.1.1 General Applies (*) (*) (*) 26.5.1.2 Service temperature Applies (*) (*) (*) 26.5.1.3 Maximum surface temperature Modified (see 8.2) (*) (*) (*) 26.5.2 Thermal shock test Applies (*) (*) (*) 26.5.3 Small component ignition test (Group I and Group II) Excluded — — — 26.6 Torque test for bushings Excluded — — — 26.7 Non-metallic enclosures or nonmetallic parts of enclosures Applies (*) (*) (*) 26.8 Thermal endurance to heat Applies (see 8.4.4) (*) (*) (*) 26.9 Thermal endurance to cold Applies (see 8.4.5) (*) (*) (*) 26.10 Resistance to light Applies (*) (*) (*) 26.11 Resistance to chemical agents for Group I electrical equipment Applies (see 8.4.6) (*) (*) (*) 26.12 Earth continuity Excluded — — — 26.13 Surface resistance test of parts of enclosures of non-metallic materials Applies (*) (*) (*) 26.14 Measurement of capacitance Excluded — — — 26.15 Verification of ratings of ventilating fans Excluded — — — 26.16 Alternative qualification of elastomeric sealing O-rings Applies (*) (*) (*) 27 Routine tests Applies (*) (*) (*) 28 Manufacturer\'s responsibility Modified (see 9.1) (*) (*) (*) 29 Marking Modified (see 11) (*) (*) (*) 30 Instructions Modified (see 10) (*) (*) (*) 30.1 General Applies (*) (*) (*) 30.2 Cells and batteries Excluded — — — 30.3