>"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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