Hello all, I was wondering if anyone could direct me to a reference or standard that specifies the dc polarity symbol that you find on ac to dc power adaptors used for laptop computers. This is the symbol that has a positive symbol on one side and a negative symbol on the other, both in circles, with a circle inside a C between the two polarity circles. The C is connected to one of the polarity circles and the circle inside the C is connected to other polarity circle. I can't find a reference to this symbol in IEC 60417, unless my copy is too old to have it. Any help is appreciated. Best regards, Ron Wellman ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/
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