Hi Brian, Yes, it will trip. I have even worse news for you. It may trip if your touch current is less than 5 mA. We use the human body model for touch current measurement, and it's frequency limited. I had a product that was less than 1.5 mA touch current when measured with IEC 60990 methods, but it measured 9 mA when measured by a meter that went up to 100 kHz frequency response. There was a lot of high-frequency current blocked by the touch current network. However, the product regularly tripped GFCIs, since GFCIs don't necessarily have a low-pass filter.
The Y-caps on many IT product power supplies might allow current at higher frequencies onto the ground which could trip GFCIs. Plug a bunch of IT products into the same GFCI circuit, and the risk of nuisance tripping goes up. Ted Eckert The opinions expressed are my own and do not necessarily reflect those of my employer. From: Brian Kunde <[email protected]> Sent: Wednesday, August 24, 2022 1:27 PM To: [email protected] Subject: [EXTERNAL] [PSES] High Touch Current and GFCIs If I have a rake of electrical equipment with a single power cord and a combined touch current exceeding 6mA, and I plug the rake into a circuit with a GFCI, will it trip? Thanks. The Other Brian - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Femc-pstc.html&data=05%7C01%7Cted.eckert%40microsoft.com%7Cff2f9a7566f64b29dcdf08da860f12f3%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637969696549312115%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Fa3Vt2WI4ejMxVeKFsMNjPdNsfEMMC0AT%2BKrNQIzwWY%3D&reserved=0> Website: http://www.ieee-pses.org/<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2F&data=05%7C01%7Cted.eckert%40microsoft.com%7Cff2f9a7566f64b29dcdf08da860f12f3%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637969696549312115%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SNjI39rCns7DirWXDdhMLJTjWOj1p%2Feu%2BGBDcZcMvjA%3D&reserved=0> Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flist.html&data=05%7C01%7Cted.eckert%40microsoft.com%7Cff2f9a7566f64b29dcdf08da860f12f3%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637969696549312115%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=O2TweDV12aSXphuk1F3qF%2FxKpBaTTeFrXKAXQO%2FKkQM%3D&reserved=0> List rules: http://www.ieee-pses.org/listrules.html<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flistrules.html&data=05%7C01%7Cted.eckert%40microsoft.com%7Cff2f9a7566f64b29dcdf08da860f12f3%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637969696549312115%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=KMHJdwsE8GiuKJzHVUY73aWQj%2FetJy7ZpoV%2BT0%2Bu%2Fi4%3D&reserved=0> For help, send mail to the list administrators: Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> ________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
