Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df06.r1000.mx.aol.com (Internet Inbound) with ESMTP id BEDC2380001A2; Tue, 11 Oct 2011 07:59:42 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RDays-0003Vp-6I for rs_out_1@blacksheep.org; Tue, 11 Oct 2011 12:58:46 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RDayr-0003Vg-QZ for rsgb_lf_group@blacksheep.org; Tue, 11 Oct 2011 12:58:45 +0100 Received: from imr-ma01.mx.aol.com ([64.12.206.39]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RDayp-0003Wy-7i for rsgb_lf_group@blacksheep.org; Tue, 11 Oct 2011 12:58:45 +0100 Received: from mtaout-da03.r1000.mx.aol.com (mtaout-da03.r1000.mx.aol.com [172.29.51.131]) by imr-ma01.mx.aol.com (8.14.1/8.14.1) with ESMTP id p9BBwbnJ020066 for ; Tue, 11 Oct 2011 07:58:37 -0400 Received: from [192.168.1.68] (host-92-6-236-249.as43234.net [92.6.236.249]) by mtaout-da03.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id E7AC5E0000D3 for ; Tue, 11 Oct 2011 07:58:36 -0400 (EDT) From: g4gvw To: rsgb_lf_group@blacksheep.org In-Reply-To: <4574BD57-C0FA-4BA4-A570-079AB21D6C4E@leeds.ac.uk> References: <20111009.155855.1944.3.riese-k3djc@juno.com> <002d01cc86eb$6f677730$0401a8c0@xphd97xgq27nyf> <4574BD57-C0FA-4BA4-A570-079AB21D6C4E@leeds.ac.uk> Date: Tue, 11 Oct 2011 12:58:20 +0100 Message-ID: <1318334300.3315.4.camel@pat-compaq-evo> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 X-AOL-SCOLL-SCORE: 0:2:398765408:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: mains wires Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:430349536:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40da4e942fae78f5 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi All, For years as G3nyk will attest, my practice has been to run all mains operated test equipment via a single, large isolating tranny. The one I have also has a Faraday screen. One of the best surplus buys I ever made. I prefer the test bench to be a safe environment. 73 On Mon, 2011-10-10 at 11:10 +0100, Chris Trayner wrote: > Hi Mal, > > On 10 Oct 2011, at 02:25, mal hamilton wrote: > In the UK the switch is always in the LIVE (hot) wire and NEUTRAL direct to the appliance except it happens to be a double switch. > > 'Is', but not always 'was' ;-) > There used to be 'live chassis' radios and TVs with the single-pole mains on/off switch between the chassis and the neutral lead. Turn it off and the chassis would be genuinely live ... > > > 73, > Chris G4OKW > ----------------------- > Dr Chris Trayner > School of Electronic & Electrical Engineering, > The University of Leeds, > Leeds LS2 9JT, United Kingdom > Tel: +44 113 34 32053 > Fax: +44 113 34 32032 > > > > -- 73 es gd dx de pat g4gvw qth nr felixstowe uk (east coast, county of suffolk)