From owner-freebsd-hackers Fri Mar 6 19:23:47 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id TAA14049 for freebsd-hackers-outgoing; Fri, 6 Mar 1998 19:23:47 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from sendero.simon-shapiro.org (sendero-fddi.Simon-Shapiro.ORG [206.190.148.2]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id TAA14039 for ; Fri, 6 Mar 1998 19:23:40 -0800 (PST) (envelope-from shimon@sendero-fxp0.simon-shapiro.org) Received: (qmail 22709 invoked by uid 1000); 7 Mar 1998 03:31:58 -0000 Message-ID: X-Mailer: XFMail 1.3-alpha-021598 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <199803070316.WAA00278@dyson.iquest.net> Date: Fri, 06 Mar 1998 19:31:57 -0800 (PST) Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: "John S. Dyson" Subject: Re: SCSI Bus redundancy... 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) Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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