Amund,To expand on what Rich as said, UL adapted IEC 60950
ITE products and IEC 61010 commercial/industrial electronic equipment as UL
standards early on so there have been harmonized IEC/UL requirements for
these products for 30 years; IEC 60950 has been replace by IEC 623268-1
Hi Amund:
First and foremost, both the IEC and UL make money selling standards.
Second, UL does not adopt any IEC standard, or most other non-UL standards.
UL will test to an IEC standard, and may issue a CB test report, but not the
right to use their certification mark. UL will
Hi Matthew
Although I’ve not checked that they all correlate, I believe that the
efficiency calculations originate from the International Efficiency Marking
Protocol for External Power Supplies:
https://beta.regulations.gov/document/EERE-2008-BT-STD-0005-0218
The requirements were negotiated between EC-hired consultants and
industry stakeholders. Or so I was assured.
==
Best wishes John Woodgate OOO-Own Opinions Only www.woodjohn.uk
Rayleigh, Essex UK
"A nation
EU 2019/1782 is the ecodesign requirements for external power supplies, i.e.
their efficiency, for Directive 2009/125/EC. Someone asked me how the formula
in 1(b) of Annex II of the EU 2019/1782 regulation was decided upon. This table
sets out the determination of 'average active efficiency'.
Hello Amund,
I most often use UL 61800-5-1 that contains numerous and significant national
deviations from IEC 61800-5-1. Most of these adapt the requirements of the IEC
standard to those of the NEC NFPA 70, and to those of UL component standards.
If you have a specific standard in mind, you
In principle is right, but UL can add US Differences, referring to UL standards
and NEC requirements.
Best Regards and Be Safe,
Steli
Steli Loznen, M.Sc., SM-IEEE
VP for Technical Activities and Member of BoG IEEE-PSES
Convener IEC 62A/MT29+MT 62354
17-3 Shaul HaMelech Blvd.
Tel Aviv 6436719
When IEC publish a standard, do UL adopt it as is, or do they modify it? I
guess this will vary form case to case. Right?
Best regards Amund
-
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