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
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
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
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
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'.
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
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
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
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
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