"Ed Huntress" wrote in message
...

It's instructive to see what happens to a wall-wart when you abuse it. If
you short the output of one, most of them will fry themselves in an
instant from the current overload.


That's because they are almost always with Underwriters Labs as being a
"current limiting device" and as such they are actually designed to fry in
an overcurrent situation--and the main reason they are so prevalent these
days is exactly because this...IE, in many situations it allows
manufacturers to circumvent agency certification so long as the device is
sold along with a "listed power supply"....essentially making it faster,
easier and less costly for manufacturers to bring new electronic items to
the marketplace..

That said, beware of "counterfiet UL stickers", items imported from
Communist China being notorious for this particular consumer fraud.

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