On Wed, 30 Jul 2008 23:04:55 +0100, wrote:

Vacuum cleaners with a mains outlet ...? Can you explain that please?

Normally "workshop" type vacuums, they have power socket into which you
plug a power tool. When you fire up the power tool the vacuum
automatically starts, switch off and the vac runs on for a few seconds
then switches off as well.

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Cheers
Dave.