On 11 November 2011 16:13, Peter Blodow <p.blo...@dreki.de> wrote:

> hereabouts, you can't even buy outlets or plugs with only 4 leads.

That seems a bit strange. What do you connect the neutral to, if there
is no external star point on a motor. for example?

A typical VFD, for example, has nowhere to connect that extra wire. Do
you leave it dangling? Do you need to fuse it?

(To prove they exist:
http://www.tlc-direct.co.uk/Main_Index/Plugs_and_Sockets_Industrial_Index/Plugs_and_Sockets_Ind_415v/index.html#Red_415v_16_Amp_4_Pin
)

-- 
atp
The idea that there is no such thing as objective truth is, quite simply, wrong.

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