On Mon, 05 Mar 2007 11:20:54 -0700, Chris Howard wrote:
>Please expand and define how you are using the term "must".
It is in the electrical section of building codes for virtually all
of the develope world, and these building codes carry the force of
LAW (that is, they are adopted by local governments). There are
relatively minor differences between Europe and North America,
primarily relating to exactly where the neutral to ground bond is
made. For a technical discussion of this, see the tutorial
referenced in my previous post.
73,
Jim K9YC
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