Yes Ed, voltage is certainly one part of the equation but the real issue is current associated with it. In your case take a look at mil –hdbk-454B section 5.2 electrical shock and table 1-I. Commercial standards also require protection from contact with hazard voltage (generally greater than 60 Vdc) and lower voltage circuits that have 5 amps or so of available capacity – this is not the operating current but what is available in worse case.
By the way – not truly applicable as many of the standards guys will point out, but the Military purchasing does reference UL 60950 when buy COTS. That happens to be an information technology standard but it does indicate a willingness to follow safety standards other than MIL-hdbk-454B ________________________________ From: Price, Edward [mailto:[email protected]] Sent: Friday, July 22, 2011 6:04 AM To: [email protected] Subject: [PSES] Vehicle Power Safety This is way out of my area, as all I know about safety is that I’m supposed to keep at least one hand in my pocket at all times. But seriously, is there any safety code or spec that address the human safety hazard of a 24 VDC vehicle electric system? Although the voltage level seems to preclude shock hazard, is there anything that is concerned with the huge current that could be available through a fault? Thanks in advance! Ed Price [email protected] <blocked::mailto:[email protected]> WB6WSN NARTE Certified EMC Engineer Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 Military & Avionics EMC Is Our Specialty - ---------------------------------------------------------------- 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - ---------------------------------------------------------------- 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
