Thanks Piers. I must admit that AC electricity has always had me
somewhat puzzled; I tamper with ring main wiring with great caution!
Chris
On 15 Apr 2004, at 11:46, Piers Hemy wrote:
>
> Quite right, Chris, and (as far as UK supply is concerned) quite wrong
> Daniel, in the sense that you would be ill-advised to mix them up!
> But I
> will be happy for Tim Hughes to tell me otherwise (again!).
>
> Thw neutral wire *is* neutral, with zero current flowing, when the
> entire
> system is running properly - the entire system is a three-phase AC
> system,
> able to provide 415V three-phase, and 24v from any one phase. For
> domestic
> supply, single pahse is the norm, and assuming all three phases are
> balanced, there will be no current flowing on the neutral (which is
> common
> to all three pahses).
>
> It was a question that bugged me at school too (thinking of James
> Royall's
> original question) but I got the answer in Chemistry rather than
> Physics
> class. Put that down to the approachability of the teacher.
>
> Piers
>
>
<|_:-)_|>
C M I Barker
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