On 21 Apr, Clint Wolff (VAX collector) wrote:

> Protective ground is NOT identical to N, even if they are wired together
> at the main breaker panel (as in USA). [...]
I know, it is the same in Germany. The statement "Protective ground is
identical to N." was only a simplification to illustrate why you
messure the same voltage from a phase to N and from a phase to
protective ground. I wanted to describe how three phase power works,
not how failure protection works and what different kinds of power
network types (TN-C, TN-S, TN-CS, TT, IT or how they are called in the
USA) are possible. 
-- 



tschuess,
          Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz