I believe Tania is correct for the following reasons.
If its says Listed and still has a manufacturers name or model number - fix
it in the report. Listed devices don't need that information in the report.
Only that it is Listed and the ratings. Listed products by their designation
are supposed to be able to be used without error by the end user. Typically,
they plug it in and go. Listed products are also required to carry the
Listed logo providing the FUS inspectors with instant confirmation of the
product - as long as it meets whatever ratings were originally provided.
Recognized component on the other hand, may have conditions of acceptability
along with them that may make them unsuitable in applications where similar
devices are used - but which don't have the conditions of acceptability.
They also are not required to carry a Recognition mark. This I believe is
most likely due to the small size of most recognized components.
Fortunately, many components do carry the marking but they are not required
to do so.
There are better and less complex issues to demonstrate the point but a
particular hot pot of mine is power supplies. Unless you check carefully
sometimes these supplies are recognized as long as there is X amount of
airflow over the power supply. EG. It was running to hot during the test and
the manufacturer asked UL or whomever, to place a fan with some amount of
CFM across the supply during recognition testing.
As a condition of acceptance of the power supply in the end product there
then has to be at least the same amount of CFM over the supply. That doesn't
necessarily mean that if the end product has fan cooling that that air is
diverted over the supply in question. So before acceptance at least that
construction feature would have to be evaluated by the certifying agency.
On the other hand if this was a Listed wall mount supply with a 10 volt 1
amp output. It stands on its own and the report should only describe it that
way. If you have a second vendor with identical ratings there is no
additional consideration for the power supply - or shouldn't be. If you are
having trouble with your certifier over this - educate them.
The text or equivalent isn't really required but it doesn't hurt either.
Take advantage of all text that works to your benefit. Minimum and Maximum
(well except with wire gauge) also by you flexibility.
Gary
-----Original Message-----
From: Tac Pham [mailto:[email protected]]
Sent: Tuesday, October 26, 1999 10:45 AM
To: 'Derek Walton'
Cc: 'emc-pstc'
Subject: Re: Keeping up with technology
----- Original Message -----
From: Grant, Tania (Tania) <[email protected]>
Tania wrote:
> However, if the UL Report states: ".....Modem,
Listed...(or
> Recognized)..." this means that any modem, as long as
it is UL
> Listed/Recognized and so marked, can be used in place of
the first modem
> that you submitted to UL.
Technically, we could replace the listed/recognized
components that so
marked. But, practically, UL required us to submit the
revised safety report
indicate that the new model number is added as alternate
component for FUS
purpose, unless it is specified in the "section general" of
UL report.
CSA allows manufacturer to put into the safety report "or
certified
equivalent" and we can directly replace as you mentioned.
Tac Pham
HC Power, inc.
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