I'm finding that we're spending many thousand dollars on UL testing
for safety when we are using a UL listed open frame power supply, a UL
listed power switch, a UL listed power inlet, and a few pieces of
wire. Meanwhile, I can buy a "wall wart" external switcher for $10 or
less that is UL listed.
So, the questions are:
1. If we were to use a UL listed enclosed power supply with an
integral AC inlet (think of a desktop supply for your laptop computer)
and place it inside our product with a hole in the rear panel allowing
access to the inlet, could we substantially decrease the cost of
testing for compliance? This would be similar to the power supplies
used in desktop computers where the supply is totally enclosed. Just
DC wires come out one side and an AC inlet shows through the rear
panel of the PC.
2. If we could reduce compliance testing costs through the use of
such a power supply, who manufactures supplies like that in the 30 to
50 watt range? Or, should we just stick a desktop supply inside our
product and provide brackets that keep it from flopping around in our
cabinet?
THANKS!
Harold
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