Return-Path: Received: (qmail 28115 invoked from network); 17 Dec 2002 19:36:56 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 17 Dec 2002 19:36:56 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 23166 invoked from network); 17 Dec 2002 19:36:55 -0000 X-Priority: 3 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 17 Dec 2002 19:36:55 -0000 X-MSMail-Priority: Normal X-SQ: A X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18ONVK-0005Cp-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 17 Dec 2002 19:35:46 +0000 Received: from [212.125.75.12] (helo=mail4.messagelabs.com) by post.thorcom.com with smtp (Exim 4.10) id 18ONVG-0005Cc-00 for rsgb_lf_group@blacksheep.org; Tue, 17 Dec 2002 19:35:45 +0000 X-VirusChecked: Checked X-Env-Sender: William.Ashlock@edwards.boc.com X-Msg-Ref: server-21.tower-4.messagelabs.com!1040153710!22313 Received: (qmail 21395 invoked from network); 17 Dec 2002 19:35:10 -0000 Received: from unknown (HELO ukfw1.ge.boc.com) (193.131.2.157) by server-21.tower-4.messagelabs.com with SMTP; 17 Dec 2002 19:35:10 -0000 Received: from z-160-100-160-136.est.ibm.com ([160.100.160.136]) by ukfw1.ge.boc.com; Tue, 17 Dec 2002 19:32:51 +0000 (GMT) Received: from exc_wil04.edwards.boc.com ([162.118.144.226]) by exc_cra03.edwards.boc.com with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2653.13) id YSKVSQD1; Tue, 17 Dec 2002 19:36:37 -0000 Received: by EXC_WIL04 with Internet Mail Service (5.5.2653.19) id ; Tue, 17 Dec 2002 14:32:50 -0500 Message-ID: From: "Ashlock,William" To: rsgb_lf_group@blacksheep.org Date: Tue, 17 Dec 2002 14:32:49 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Subject: RE: LF: System Resistance+ Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Status: No, hits=0.7 required=5.0tests=EXCHANGE_SERVER,INVALID_MSGID,SPAM_PHRASE_00_01version=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Jim, >>....Please separate System R and actual Earth R ... >It would certainly make life easier. Please tell us how this separation is >to be accomplished... I think Mal's point is that we have to be very cautious about reporting effects such as this without fully evaluating the total system. Another easy mistake (and this hits close to home due to the saturated 'tree density' on my property) is to report ground loss without taking tree losses into account. They both effect the total system resistance and are hard to separate. I was just about to post an interesting story about the extremes of loop current I have witnessed over the last week. The soil changed from a nearly saturated moisture condition, to a frozen condition, to a rain/snow soaked condition, and to a frozen condition. Easy to assume it's the ground that's causing the loop current to change 30%, right? Just before I hit the SEND button I recalled that my 26ft diam .8" Cu test loop indicated almost no change from the .07 ohms Rac during this time - so how could the above variance be totally caused by the soil moisture? Bill A _____________________________________________________________________ This e-mail has been scanned for viruses by the WorldCom Internet Managed Scanning Service - powered by MessageLabs. For further information visit http://www.worldcom.com