An acute observation, and thanks, too for diving into the UL site.
"Factory assembled", eh?
The thot plickens!
Cortland
KA5S
> [Original Message]
> From: Tim Groat <tcgroat@mesanetworks.net>
> To: <rfi@contesting.com>
> Date: 12/20/2006 10:15:57 PM
> Subject: Re: [RFI] Low voltage lighting solid state "transformers"
(long,somewhat OT)
>
>
> >"Cortland Richmond" <ka5s@earthlink.net>:
> >
> >I see from the UL site they are made by
> >PILOT INTERNATIONAL LTD E185630
> >ROOM 1708-09, 17/FL
> >TOWER A, REGENT CENTRE
> >63 WO YI HOP RD
> >KWAI CHUNG, NT HONG KONG
> >and they have a valid UL listing
>
> Not quite! They are *recognized components*, but that is not the same as
a
> Listed finished product. Note the backwards "RU" (USA) and "cRU" (Canada)
> approval logos in the photo
>
<http://www.hrelampparts.com/files/Cat/HRE/Ballast_Transformer/M_LVT_60N.jpg
>.
> That is a component recognition mark--not the listing mark (UL and cUL in
a
> circle for USA and Canada, respectively).
>
> From the UL web site: "The devices covered under this category are
> incomplete in certain constructional features or restricted in
performance
> capabilities and are intended for use as components of complete equipment
> submitted for investigation rather than for direct separate installation
in
> the field. THE FINAL ACCEPTANCE OF THE COMPONENT IS DEPENDENT UPON ITS
> INSTALLATION AND USE IN COMPLETE EQUIPMENT SUBMITTED TO UNDERWRITERS
> LABORATORIES INC." (emphasis in the original)
>
> According to the details of their UL file, the output is not Class 2 (OC
=
> 4; it would be 1 if it was Class 2 output). That does not agree with the
> seller's web page
> (<http://www.hrelampparts.com/CatPages/ADL/Hardware/H039.html>, about 3/4
> down on the right side). The output cannot be connected to CL2 or similar
> low power wiring. It is not suitable for field wiring (FC = 0). It has
only
> functional grounding rather than safety grounding (GC = 0), though it
> appears to have a non-conductive plastic enclosure. The supply must
operate
> within safe temperature limits in the final product (adequate
ventilation,
> etc.). None of this means it's defective, only that the supply must be
> *factory assembled* into a finished, Listed product ready for
installation
> and use.
>
> From Steve's Dec 16 post, "..the electrician put them in small
> receptical-sized boxes." If the *electrician* installed them in the box,
> that could be improper application of a recognized component where a
Listed
> product should be used. If the *lamp manufacturer* installed the power
> supplies in the boxes and earned their own Listing mark for the complete
> product, there is no issue. So look for a Listing mark on the complete
> lighting system.
>
> The ultimate manufacturer also is the responsible party for FCC
compliance.
> For RFI, selling a *component* is comparable to the recognized component
> safety situation (in most cases). Manufacturers legally can and do sell
> non-compliant power supplies to manufacturers, per FCC rules
15.101(e)(3).
> The final manufacturer is responsible for including the necessary
> filter(s), shielding, and for emissions testing. The combination of
> component recognition for product safety and the lack of FCC markings
> suggests--but doesn't prove--that the power supply was designed for use
> with external filtering.
>
> The usual disclaimers apply. This is not professional advice; if you need
> some hire a PE, which I am not.
>
> --Tim (KR0U)
>
>
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