RE: [EFM] Environmental classes
I guess these further classes would be within IEC 60721-3-4.
The present debate is about what to do about temperature.
Obviously, conditions vary. For some equipment, it may be impractical or expensive to meet a global superset.
You mention humidity. Like temperature, earthquake protection, weight, and many other product specifications, I hope EFM will have the good sense to stay with 802.3's traditional position of leaving the specification and measurement of such parameters to others.
> -----Original Message-----
> From: Roy Bynum [mailto:rabynum@xxxxxxxxxxxxxx]
> Sent: 08 January 2003 19:27
> To: email@example.com; firstname.lastname@example.org
> Subject: Re: [EFM] Environmental classes
> Are there classifications for "Hot Humid", "Extremely Hot",
> and "Extremely
> Humid"? These conditions exist in parts of the Southern USA,
> and almost
> all tropical environments. There are other "hazardous"
> environments as
> well that might need to be considered.
> Thank you,
> Roy Bynum
> At 04:11 PM 1/8/2003 +0100, piers_dawe@xxxxxxxxxxx wrote:
> >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"
> > extended
> > extremely cold
> > 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
>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