AS/NZS 60079.15:2020 pdf free.Explosive atmospheres Part 15: Equipment protection by type of protection “n” (IEC 60079-15:2017 (ED.5.0) MOD). Explanation of the types of changes: A) Definitions 1) Minor and editorial changes: • Clarification • Decrease of technical requirements • Minor technical change • Editorial corrections These are changes which modify requirements in an editorial or a minor technical way. They include changes of the wording to clarify technical requirements without any technical change, or a reduction in level of existing requirement. 2) Extension: Addition of technical options These are changes which add new or modify existing technical requirements, in a way that new options are given, but without increasing requirements for equipment that was fully compliant with the previous standard. Therefore, these will not have to be considered for products in conformity with the preceding edition. 3) Major technical changes: • addition of technical requirements • increase of technical requirements These are changes to technical requirements (addition, increase of the level or removal) made in a way that a product in conformity with the preceding edition will not always be able to fulfil the requirements given in the later edition. These changes have to be considered for products in conformity…