Date: Fri, 06 Mar 1998 19:31:57 -0800 (PST) From: Simon Shapiro <shimon@simon-shapiro.org> To: "John S. Dyson" <dyson@FreeBSD.ORG> Cc: karl@mcs.net, tlambert@primenet.com, dmlb@ragnet.demon.co.uk, wilko@yedi.iaf.nl, julian@whistle.com, hackers@FreeBSD.ORG, lada@ws2301.gud.siemens.at, (Chuck Robey) <chuckr@glue.umd.edu> Subject: Re: SCSI Bus redundancy... Message-ID: <XFMail.980306193157.shimon@simon-shapiro.org> In-Reply-To: <199803070316.WAA00278@dyson.iquest.net>
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On 07-Mar-98 John S. Dyson wrote: > Chuck Robey said: >> >> Of course, their equipment does largely run on 48V nominal (which >> usually >> means around 55-56 V in fact, else the battery plant'd not ever get >> charged). Getting buzzed with 48V is nothing, even with 1500 Amps >> behind >> it, I've been bitten countless times. Ringing battery is _much_ more >> painful! Old style teletype, at polar +- 130V, would _really_ wake you >> up (thank god that was interrupted). >> > Getting buzzed isn't the problem with 48V and mega-amps. It is any kind > of metal jewelery melting and burning off skin :-(. We knew to take off all jewlery. The killer was the dog-tags. You stayed for a qhile in the hospital after one of these evaporated around your nexk. I witnessed the aftermath of a Phillips #2 screwdriver dropping someplace it should not. Quite a site. A switching center here in town is using surplus submarine batteries. There are sealed and lay on their side, so they are not as sparky as the old open cells. ---------- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG Voice: 503.799.2313 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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