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#11
August 10th 03, 04:22 AM
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In article , Paul Burridge
writes: On 09 Aug 2003 19:46:02 GMT, (Avery Fineman) wrote: If the source has over 30 Volts and can supply over 30 milliamperes through the cardiac region, you will go into cardiac fibrilation. Sorry, Len, but I can't see it. I routinely check for HV on the anodes of certain smallish valves with bare fingers and can't even begin to feel anything under about 80 volts (at very much more current capability than 30mA) at the low end. However, I read somewhere that some guy died from just a 12V 'shock' - must have been a world record.. :-( I'm not concerned with what YOU do personally, nor will I set any "standards" for all humans based on what one human can or can't do or feel. I got the "30-30" phrase while working at Birtcher Instruments, a semiconductor test instrument maker and a division of Birtcher Medical that made several different medical electronic instruments (EKG, RF knife/cautery, defibrilators,etc.). Someone at Birtcher Medical told me about it. I was Chief Engineer at Birtcher Instruments in Monterey Park, California, a suburb of Los Angeles (not the upstate Monterey, CA, where some FedEx deliveries went, hi). I don't think that my employer at the time would give me false information. The City of Los Angeles building and safety codes don't require inspection of 24 VAC wiring in residences and that sort of wiring is common here for furnace and HVAC controls, doorbells, etc. That AC voltage is never considered "high voltage." That is probably true of the USA National Electrical Code although I haven't read one recently (I've only read the coding in the Numeric Electromagnetic Code recently, quite different from the other "NEC"). I really don't know the medical-biological low threashold for direct cardiac stimulation through an opening in the chest cavity. I don't care to know. I care to know NOT to futz around with my or anyone else's body with anything above the "30-30" limits. If YOU want to experiment with your own body, feel free. Then you transport yourself to that other "reality." When you get there, ask someone there to shock themselves into this reality and tell us all what it is like "over there." I live in THIS reality where survival depends on not treating electricity cavalierly like it was words in a newsgroup. Happy zapping. Len Anderson retired (from regular hours) electronic engineer person |
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