technical change (i.e. “changes to technical requirements 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.”) It is so significant that any cable gland that has been certified previously without a sealing gasket fitted as standard (which is most cable glands, certainly in the UK) must undergo retesting and be recertified. Despite the fact that IEC 60079-0 Ed. 7 has been in existence since December 2017, most cable gland manufacturers have not yet reacted to this major technical change. Failure to fit cable glands certified to IEC 60079-0 Ed. 7 could be a reason for an installation to fail its initial inspection.
(At the time of writing, the new edition of BS EN 60079-0 had still not been published, but IEC 60079-0 Ed.7 can still be used in an ATEX certification as it represents the latest technical knowledge.) Before we leave this topic, it should be noted that the material of the sealing gasket is often what determines the maximum temperature that a cable gland can be used at, so some of the claimed temperature ranges for cable glands will have to be reduced once they are tested with sealing gaskets in place.