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Message Digest
Volume 28 : Issue 69 : "text" Format
Messages in this Issue:
Re: Technical Demo turns political 2/26/1909
Re: To Bury or Not to Bury
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Date: Mon, 09 Mar 2009 04:07:19 GMT
From: "Gene S. Berkowitz" <first.last@verizon.net>
To: redacted@invalid.telecom.csail.mit.edu
Subject: Re: Technical Demo turns political 2/26/1909
Message-ID: <MPG.241e5fdc8c09dc3d989954@news.verizon.net>
In article <gp0mrp$fvk$1@panix2.panix.com>, kludge@panix.com says...
> There are also big cities with huge amounts of undocumented
> infrastructure under the streets, where the excavation has to be done by
> hand and the cable laid a foot at the time to prevent disturbing other
> services.
> --scott
Thank goodness that those cities should soon have a steady supply of
bankers and stock brokers, who, with patient training, can be taught
which end of the shovel to hold.
--Gene
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Date: Mon, 09 Mar 2009 12:35:59 -0400
From: Will Roberts <oldbear@arctos.com>
To: redacted@invalid.telecom.csail.mit.edu
Subject: Re: To Bury or Not to Bury
Message-ID: <0MKpCa-1LgjQo1Oze-000czW@mrelay.perfora.net>
In Telecom Digest, <hancock4@bbs.cpcn.com> wrote:
>Date: Sat, 7 Mar 2009 18:45:49 -0800 (PST)
>From: hancock4@bbs.cpcn.com
>To: redacted@invalid.telecom.csail.mit.edu
>Subject: Re: To Bury or Not to Bury
>
>As to burying power lines, obviously individual lines to houses and
>lines to a block of houses can be buried. But is there a limit to the
>amount of voltage on a line that can economically be placed
>underground? I thought at one point higher voltages don't work so
>well underground.
>
>I'll note that while in the city phone lines are buried, in the
>suburbs they're on poles.
Several of the major transmission lines feeding the City of Boston have
been placed underground in the last few years:
"As part of its commitment to serve customers well, NSTAR has
commenced construction of three new, underground 345-kilovolt
(345-kV) transmission lines. The purpose of the new lines is
to reinforce the Greater Boston Area, including surrounding
communities, with additional electric power to meet both near
term and longer term customer needs for reliable electric
service."
http://www.transmissionproject.net/
http://www.transmissionproject.net/FAQ.asp
See also:
http://tdworld.com/projects_in_progress/business_in_tech/kv-xlpe-underground-cable/
And there is a "PowerPoint" presentation which explains the economics and
why the utility decided to construct a new 18-mile underground 345-kv
transmission line rather than augment existing lines or construct a new
overhead line:
http://sandbox.iso-ne.com/pubs/pubcomm/forums/2005/tcapsm_jan312005/NSTAR_345kv_Project_NE_State_Review_01_31_05%5B1%5D.ppt
(Sorry about the very long URLs.)
Regards,
Will
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End of The Telecom digest (2 messages)
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