Howdy all, I have come across a problem where a product is exceeding 3.5 ma of touch current. The product in question has 2 line filters and 4 Switching Mode Power Supplies. Because of the addition of the fourth power supply the overall touch current can be as much as 4.0 ma. Ideally, we do not want to make the product so it has to be hard-wired to the building mains. Because of the high touch current, does anyone know what the relationships are between different touch current sources? I've heard that touch current is not linear when you add up the different sources and phase shifts between L-G and N-G might be a problem. However, I'm looking for some detailed information on this issue so I can provide ways to investigate the problem and hopefully reduce the overall touch current. BTW, the product is not medical equipment and all touch current tests are done with the product operating at 264 V AC, 50 Hz. 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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