[EFM] Environmental classes
G.983.3 refers to ETS 300 019. This is a very readable series of documents from the European Telecommunications Standards Institute, giving a classification of environmental conditions, e.g. weatherprotected locations, non-weatherprotected, underground. It uses four classes of climatic conditions:
"applies to most of Europe"
extremely warm dry
And even better, up-to-date drafts are available on the web, e.g. at
It is not the business of 802 to pick between these classes but we can refer the readers of our standard to this information.
ITU-T and ANSI T1 do not have similar documents.
Both G.983.3 and refer to IEC 60721, classification of environmental conditions.
IEC 60721-3-4 - Ed. 2.0 Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Section 4: Stationary use at non-weatherprotected locations 1995-01 is available for CHF99 at https://domino.iec.ch/webstore/webstore.nsf/artnum/019208 .