I pulled the following tables from a document that regurgitates the ICNIRP limits.
It clearly gives limb currents and, by default, I assume that the other limits must be for other parts of the body. Since these are contact currents - the current flows through the body - which is what I think you asked about. I may not be correct so check it out. If you are working in something that would exceed these limits, than I think that you are in uncharted territory for me. To consider exceeding these limits, you would need to quantify both benefits (of the process to the individual) and the risk (of harmful side effects). I would then expect that a significant benefit would need to be shown before the product could be marketed effectively. Take radiotherapy for example. The radiation dose far exceeds that which is permitted under normal circumstances BUT a person dying from cancer might derive significant benefit compared with the risk. This is the same for MRI scanners. For a truly beneficial medical device I suppose there is no limit (beneficial restricts the degree of harm that is acceptable) but for an "aesthetic" device - I am not so sure that the limits below can be exceeded. Own views only. Regards Tim Exposure Characteristics Frequency Range Maximum Contact Current (mA) Public / Occupational exposure Up to 2.5kHz Public 0.5 Occupational 1.0 2.5kHz to 100kHz Public 0.2/f Occupational 0.4/f 100kHz to 110MHz Public 20 Occupational 40 Exposure Characteristics Frequency Range Reference levels for limb Current (mA) Occupational 100kHz to 110MHz 100 Public 100kHz to 110MHz 45 ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** - ---------------------------------------------------------------- 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 [email protected] 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 [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
