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Article #23Re: is third transformer hole an earth?
From: nobody >
Date: Thu, 31 Dec 2009 06:54
Date: Thu, 31 Dec 2009 06:54
42 lines
3538 bytes
3538 bytes
David Nebenzahl wrote: > On 11/11/2008 7:47 AM Whiskers spake thus: > >> On 2008-11-10, Dave Plowman (News) <dave@davenoise.co.uk> wrote: > > >>> In article <slrnghhb1o.bes.catwheezel@ID-107770.user.individual.net>, >>> Whiskers <catwheezel@operamail.com> wrote: > >> >>>> Our power sockets are only 3kW each - but it isn't the Watts that >>>> really >>>> hurt, or even the Volts; it's the Amps you really need to be careful >>>> with. 60 Amps at a Japanese 100V would be a lot more dangerous than 30 >>>> Amps at a European 230V. (Although either could kill you, so the >>>> difference could be academic as far as the one grasping the wires is >>>> concerned). >>> >>> Not quite sure what you mean. The current drawn by a given resistance is >>> proportional to the voltage - and touching a 1000 amp supply is no more >>> dangerous to a human than touching a 1 amp one. >> >> Well you go right ahead and play with the 1000 Amp wires if you want to, >> but wait for me to get out of sight and earshot first - I'm a bit >> squeamish. > > He (Dave P.) is right. Once you're about the amount of current > sufficient to be lethal (which is measured in milliamps, not amperes), > the ampacity of a circuit you're touching--whether 15, 20 or 200 > amps--matters not. > > No reason to be overly impressed by a 60-amp circuit. No more deadly > than a 1-amp circuit. > That's true if you are just worried about contact shock hazard. Arc flash/blast is a whole 'nother ball game. http://www.easypower.com/arc_flash/arc_flash_videos.php http://205.243.100.155/frames/mpg/480VArcFlash1.wmv http://205.243.100.155/frames/longarc.htm
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X-Google-Thread: 4e777fa27a,8ae7935e94fea1ee X-Google-Attributes: gid4e777fa27a,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Thu, 31 Dec 2009 00:54:46 -0600 Date: Wed, 30 Dec 2009 22:54:44 -0800 From: "nobody >" <usenetharvested@aol.com> User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 Newsgroups: sci.electronics.repair,24hoursupport.helpdesk Subject: Re: is third transformer hole an earth? References: <gf43nr$fiv$1@registered.motzarella.org> <5JkRk.106$Cn3.92@newsfe20.iad> <slrnghc3uf.bnl.catwheezel@ID-107770.user.individual.net> <op.uke2nuxb4buhsv@fx62.mshome.net> <slrnghhb1o.bes.catwheezel@ID-107770.user.individual.net> <4ffc47586adave@davenoise.co.uk> <slrnghja8j.e5j.catwheezel@ID-107770.user.individual.net> <4b3c2faf$0$4703$822641b3@news.adtechcomputers.com> In-Reply-To: <4b3c2faf$0$4703$822641b3@news.adtechcomputers.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Antivirus: avast! (VPS 091230-0, 12/30/2009), Outbound message X-Antivirus-Status: Clean Message-ID: <bd6dnZ3PqYsr16HWnZ2dnUVZ_jGdnZ2d@supernews.com> Lines: 42 X-Trace: sv3-sjmcqMu26HAa/CYJtftIhr9gktvBTvziqgdWnhWVsYKZDiTxah1lya3BC23VKGhUDqadNWunJbCR59H!0Ua9UgCc/nVAScoV1mL8YIFWcIKgPW9oUaUxV9PAfOEwlecelNjSXkEujWaNBmDBq7j++pf3QXFs!2Pq9QUSm2o4= X-Complaints-To: www.supernews.com/docs/abuse.html X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40