On Wed, 16 Apr 2008 10:43:30 +0100, "Jeff" <jeff@local.host> wrote:
> That is why 'serious' circuit breakers have compressed air blown onto the
> gap to suppress arcing.
That beats the old system of a chap fanning the arc away with a cane
brush supplied for that purpose
Bruce
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uk.transport.london (
Re: Crossing London tube tracks
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