From owner-freebsd-stable@freebsd.org Thu May 2 19:59:40 2019 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 884EB15A0006 for ; Thu, 2 May 2019 19:59:40 +0000 (UTC) (envelope-from jhs@berklix.com) Received: from slim.berklix.org (slim.berklix.org [94.185.90.68]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "slim.berklix.org", Issuer "slim.berklix.org" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 0203B6FFCD for ; Thu, 2 May 2019 19:59:38 +0000 (UTC) (envelope-from jhs@berklix.com) Received: from mart.js.berklix.net (p2E52CADA.dip0.t-ipconnect.de [46.82.202.218]) (authenticated bits=128) by slim.berklix.org (8.15.2/8.15.2) with ESMTPSA id x42IHrVb042035 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 2 May 2019 20:17:57 +0200 (CEST) (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (fire.js.berklix.net [192.168.91.41]) by mart.js.berklix.net (8.14.3/8.14.3) with ESMTP id x42IHreW046747; Thu, 2 May 2019 20:17:53 +0200 (CEST) (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (localhost [127.0.0.1]) by fire.js.berklix.net (8.14.7/8.14.7) with ESMTP id x42IHG7U052982; Thu, 2 May 2019 20:17:34 +0200 (CEST) (envelope-from jhs@berklix.com) Message-Id: <201905021817.x42IHG7U052982@fire.js.berklix.net> To: "N.J. Mann" cc: Michelle Sullivan , freebsd-stable Subject: Re: ZFS... From: "Julian H. Stacey" Organization: http://berklix.com/jhs http://stolenvotes.uk User-agent: EXMH on FreeBSD http://berklix.com/free/ X-From: http://www.berklix.org/~jhs/ In-reply-to: Your message "Thu, 02 May 2019 18:18:16 +0100." <5D9EAA497C84C50D0DAA5491@triton.njm.me.uk> Date: Thu, 02 May 2019 20:17:16 +0200 X-Rspamd-Queue-Id: 0203B6FFCD X-Spamd-Bar: +++++++ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [7.35 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; HAS_ORG_HEADER(0.00)[]; RCVD_COUNT_THREE(0.00)[4]; TO_DN_ALL(0.00)[]; MX_GOOD(-0.01)[cached: slim.berklix.com]; SUBJ_ALL_CAPS(0.45)[6]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:33824, ipnet:94.185.88.0/22, country:DE]; RCVD_TLS_LAST(0.00)[]; RECEIVED_SPAMHAUS_PBL(0.00)[218.202.82.46.zen.spamhaus.org : 127.0.0.10]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_SPAM_SHORT(0.70)[0.696,0]; R_BAD_CTE_7BIT(3.50)[7bit]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[berklix.com]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(0.97)[0.966,0]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_LONG(0.93)[0.933,0]; RCVD_IN_DNSWL_NONE(0.00)[68.90.185.94.list.dnswl.org : 127.0.10.0]; R_SPF_NA(0.00)[]; GREYLIST(0.00)[pass,body]; IP_SCORE(-0.09)[asn: 33824(-0.43), country: DE(-0.01)] X-Spam: Yes X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 May 2019 19:59:40 -0000 Hi, Reference: > From: "N.J. Mann" > Date: Thu, 02 May 2019 18:18:16 +0100 "N.J. Mann" wrote: > Hi, > > > On Friday, May 03, 2019 03:00:05 +1000 Michelle Sullivan wrote: > >>> I am sorry to hear about your loss of data, but where does the 11kV come from? > >>> I can understand 415V, i.e. two phases in contact, but the type of overhead > >>> lines in the pictures you reference are three phase each typically 240V to > >>> neutral and 415V between two phases. > >>> > >> Bottom lines on the power pole are normal 240/415 .. top lines are the 11KV distribution network. > > > > Oh and just so you know, it’s sorta impossible to get 415 down a 240v connection > > No it is not. As I said, if two phases come into contact you can have 415v between > live and neutral. With 3 phase: - 415 between each of the 3 live phases - 240 between neutral & the 3 live phases (To visualise: draw a circle of radius 12 cm, mark off dots on circle at 120 degrees. measure between dots: 20.75cm, Neutral is compass hole in paper ) PS UK/Britain was nominal 240V, but EU inc UK is now nominal 230V +10%/-6% https://en.wikipedia.org/wiki/Mains_electricity#Standardisation Cheers, Julian -- Julian Stacey, Consultant Systems Engineer, BSD Linux Unix, Munich Aachen Kent http://stolenvotes.uk Brexit ref. stole votes from 700,000 Brits in EU. Lies bought; Campaigns fined; 1.9 M young had no vote, 1.3 M old leavers dead.