In my case our equipment is subjected to both UL60950 and UL50 -
enclousures for electronic equipment outdoors - or whatever the title is ('m
out of the office for the moment and don't have the standard. This covers rain
tests along with some other conerns dealing with transients etc.
Beyond that I am subjcting the cabinent to many of the GR-478
requirements - dust driven rain etc. The first set addresses the basic safety
the second set tells me that I can survive out there for a period of time. This
testing looks at seals, windload on doors, the effects of sun loading etc. I
would like not to have to replace or repair these things anymore often than
necessary. I don't do the set I consider site specific - burning hay bails,
gunshot penetration etc. This will probably happen sometime but are not
systemic to the product line. Long term heating and corrosion etc are going to
effect all of that.
When I get done with all of these tests, I can equate these to the IP
designations with the data.
Gary
-----Original Message-----
From: Crabb, John [mailto:[email protected]]
Sent: Tuesday, March 26, 2002 3:36 AM
To: [email protected]
Subject: RE: IP Rating and EN60950
1.1.2 of EN 60950-1:2001 states "requirements additional to those
specified in this standard may be necessary for .. equipment
intended for use where ingress of water is possible; for
guidance on such requirements and on relevant testing, see
annex T." Annex T, which refers to IEC 60529, is informative,
however.
IEC TC74, WG8, has an ad-hoc group working on requirements for
outdoor equipment. I am a member of that group. I have to say
that it will be some time before any new document is published.
The lack of any specific requirements in the standard does not
relieve you from the responsibility of producing a safe product.
For our automated teller machines, I use the UL rain test to show
that we prevent water ingress causing a hazard, rather than the
requirements of IEC 60529, which in my opinion may show that a
sealed box is watertight, but are inadequate for enclosures with
openings where an extended test (one hour) is necessary to
confirm that rain ingress does not cause a problem.
Strictly speaking, the answer to your question is : -
EN 60950 does not normative reference EN 60529 because
EN 60950 is a clone of IEC 60950, which did not normative
reference IEC 60529.
Regards,
John Crabb, Development Excellence (Product Safety) ,
NCR Financial Solutions Group Ltd., Discovery Centre,
3 Fulton Road, Dundee, Scotland, DD2 4SW
E-Mail :[email protected]
Tel: +44 (0)1382-592289 (direct ). Fax +44 (0)1382-622243. .
-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: 20 March 2002 20:00
To: [email protected]
Subject: IP Rating and EN60950
I would like someone to explain to me why EN60950 does not normative
reference EN60529. While the latter is referenced in the OJ, the scope of
the standard seems to indicate that it is a basic standard to be referenced
in product standards. The scope says, "It will remain the reponsibility of
the individual Technical Committes to decide on the extent and manner in
which the classification is used in their standards and to define
'enclosure' as it applies to their equipment.
Richard Woods
Sensormatic Electronics
Tyco International
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