On 16-09-18 03:25 PM, David Forbes wrote:
Nick,
The mark that indicates that the input and output are fully isolated
from each other is a square within another square, called "double
insulated". If you don't see that mark, and you see a UL or ETL mark,
then it's reasonable to assume that the barrel is grounded, because
otherwise the unit wouldn't pass UL or ETL testing.
Assuming of course that the input has a ground pin. if it is a two
prong plug it would be reckless to pass along one side of the line.
Although I suppose that they might trust that the Neutral prong should
be safe to pass on.
--
Charles MacDonald Stittsville Ontario
cm...@zeusprune.ca Just Beyond the Fringe
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