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Re: LF: mains wires

To: [email protected]
Subject: Re: LF: mains wires
From: John Rabson <[email protected]>
Date: Mon, 10 Oct 2011 18:40:16 +0200
In-reply-to: <[email protected]>
References: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
On 10 Oct 2011, at 17:15CEST, [email protected] wrote:

> in the US we have a standard of 120/240 
> with the 120 as the appliance voltage
> the British and others use 220 for a standard
> does that mean that 440 is used for the big power draws
> we would place our clothes dryers on 220 do you have 440
> in general use in the home

Bob,

(Warning:  my comments are based on what I remember from the early 2000s.  My 
copy of the UK wiring regulations is rather old.  Can anyone provide more 
up-to-date information?)

UK was 240 but is now officially 230 (EU harmonisation).   Normal domestic 
appliances use 230V.  Standard 3-pin socket outlets are limited to 13A.  For 
higher current, such as for an electric cooker, a separate fixed feed - not via 
a plug and socket - is required.  A clothes dryer would be designed to take a 
maximum of not more than 13A at 230V.

This is all single phase.  Very occasionally you may find a 3 phase supply in 
the home, but the supply companies don't like providing it.  If I remember 
correctly, additional regulations apply for 3 phase  Such supplies are usually 
four wire (3 phases and neutral) with 240 from each phase to neutral and 415 
between phases. 

John F5VLF/G3PAI
PS France was 220 but is now officially 230.





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