On Mon, 26 Aug 2002 llile@SALTONUSA.COM wrote:

>Well, last week we finished a protptype of a new compact oven, with fancy
>LCD controls, a nice microprocessor, and a lot of teeth-grinding work. One
>of our UL test technicians was just taking the first prototype into the UL
>lab to begin the rigorous UL tests.  I had worked a week, one night the
>night through, to complete this one handbuilt prototype on time.  The
>first test involves running the unit for 50 cycles at 20% overvoltage,
>which is 144 volts.  She calmly misread the meters and hooked this
>hard-won prototype to 244 volts.  The heating elements got so bright I
>could see them across the room, just before the bang.  Ever since then,
>the tech has been called "240 Volt Marsha"

ROFL.

Otoh, is there a particularly good reason for running UL tests on a
prototype (should not be run on pre-series units - usually the first 10
manufactured using the final factory preocedures and jigs) ?

Peter

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