for I.T, 60960-1 hazardous E = 20J; but, in my opinion, I do not believe that this should be ok for contact.
for medical, it depends on what is contacted and what is in proximity. Max E limits are determined various ways, in accordance with the charts on Annex G of 601-1 3d Ed. for test equip, 1010-1 haz E based on The charge of energy of capacitance levels are: 1) 45 µC charge for voltages up to 15 kV peak or d.c.; 2) 350 mJ stored energy for voltages above 15 kV peak or d.c. luck, Brian > -----Original Message----- > From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf > Of Robert A. > Macy > Sent: Friday, August 10, 2007 8:51 AM > To: emc-p...@ieee.org > Subject: What is killer joules? > > What is the amount of energy that kills a person? > > This may seem like mixing terms here, but: > > [If these limits are in error, please correct...] > For example, maximum leakage in Medical Electronics for > direct connection to patients is around 10uA > Maximum leakage for AC mains RFI/EMI filters is 2 mA, and > typically around 1 mA. > > These limits are based upon potential harm for some time > period, and are specified using easily measurable current. > > But I need a limit based upon joules. For example, in the > winter as we slide across the car seat, we don't die from > the 18 Kv zap. low capacitance prevents lethal harm. So > what 1/2 C V^2 kills people? > > Is there a published limit? > Is there a reference for max allowed? > > Robert - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
