But the original problem stated the limit was in terms of magnetic field,
and since a loop measures magnetic field directly, there is no problem
having to make an assumption about field impedance.
It is only when the limit is in terms of electric field but the quantity
measured is magnetic field
they don’t trust manufacturer self-certification
I hold a different opinion.
UL was founded because the “Palace of Electricity” at the Columbian Exposition
in 1893 in Chicago kept catching fire. William Henry Merrill was hired by the
insurance underwriters to investigate the
Hello John.
The problem is we have over 7000 different spare assemblies and I don't really
want to issue a DoC for each one.
Previous product DoCs have had to list each model in the range rather than just
specifying the product range series.
Regards;
Ian McBurney
Lead Compliance Engineer
For what it's worth, the Blue Guide says:
Products which have been repaired or exchanged (for example following a
defect), without changing the original performance, purpose or type, are not to
be considered as new products according to Union harmonisation legislation.
Thus, such products do
Everyone is entitled to an opinion and I said “most likely would not”. I have
never had this problem so I do not know but I merely suggested that you read
your contractual agreement with your NRTL. I am also of the opinion that the
FUS provided by a NRTL is a critical dimension to product
“Manufacturers are solely responsible for compliance with EMC standards for
NA.” Except for wireless radio equipment which generally does require TCB
testing and issuance of an FCC ID or Canada ICES certification number.
Jim Hulbert
From: Nyffenegger, Dave
I believe Mark’s comment is over the top. The NRTL test houses can be drawn
into court cases and they will confirm that the product tested met the
requirements of the standard. Then the argument becomes whether or not all of
the safety issues are properly covered in the standard; today the
Another way to look at it: the NRTLs are responsible for the work that they do,
which is primarily checking products against product safety standards. However,
for the manufacturer, complying only with the requirements of a product safety
standard may not be sufficient to field an adequately
The fact remains that Turkey can demand anything it likes. Offer them a
single DoC that lists all 7000 assemblies, but skip the parchment and
gold lettering.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-01-18 15:53,
So their certification is a sort of 'whitewash', nothing more, if, as
you say, they bear no responsibility for the product actually being safe.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-01-18 13:53, Schmidt, Mark
Yes, I know the whole story, and that the US/Canadian third-party
testing and certification applies to safety and not EMC. It doesn't
alter the fact that the EU replaced such a scheme in Europe
(S/D/F/N/EMKO/BEAB etc.) by the present system for the reasons I outlined.
Best wishes
John
Your simplest course is not to argue but give them the DoC they want. As
you say, Turkey is not in the EU, so it could, if it wanted, require a
DoC written on parchment, with gold lettering.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh,
If you read in to the contractual agreements you sign for these OSHA NRTL’s
they are responsible for basically nothing and most likely would not support
you in a court of law. However, some reputable labs that I have worked with
that are not recognized by OSHA I believe would. Bottom Line: the
Of course the manufacturer is responsible for the design. Likely the
manufacturers are not trusted by the public. There is a long history, some of
the US nationally recognized certification labs have been around since 1800s.
One lab was founded by Thomas Edison. Accreditation of the labs
Dear Colleagues.
Can anyone point me to the relevant section in the EU directives regarding the
shipping of spares into the EU?
We are shipping a spare PSU PCB assembly into Turkey and the Turkish customs
want a Declaration of Conformity document. I know Turkey is not in the EU but
they are
I typed this reply yesterday, but didn’t get around to hitting send.
In the mean time Pete has said pretty much the same thing….
Hi Laura,
The UK mark caught my eye as well, but I am not aware of any details about it
so far.
The Schedule 25 of the draft SI (Statutory Instrument) refers to
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