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Article #69

Re: Edinburgh Waverley station improvements

#69
From: Clive D. W. Feather
Date: Fri, 07 Apr 2006 06:33
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In article <slrne35n5m.cvh.david@pepper.local.lan>, David M 
<david@bogus.domain.dom> writes
>I was under the impression that the safe distance from these
>kind of high voltages was a good couple of metres.

The breakdown voltage of dry air is about 1kV per mm. So a 25kV line 
would need about an inch.

In practice you allow more because of moisture in the air and other 
issues. But that will show you the order of magnitude involved.

-- 
Clive D.W. Feather                       | Home: <clive@davros.org>
Tel: +44 20 8495 6138 (work)             | Web:  <http://www.davros.org>
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From: "Clive D. W. Feather" <clive@on-the-train.demon.co.uk>
Newsgroups: scot.general,ed.general,free.uk.scotland.transport-railways,uk.railway
Subject: Re: Edinburgh Waverley station improvements
Date: Fri, 7 Apr 2006 07:33:35 +0100
Organization: Demon Internet
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