replying to hrhofmann, im2oldBob wrote:
In a textbook, Electric Wiring Residential 15th edition based on 2005 National
Electrical Code by Ray C Mullen. ISBN1-4018-5019-. Mr. Mullen addresses the
subject. Mr. Mullen' advocates, that while not a code requirement that the
ground ( U blade) should be up for the reason that conductive items falling
would encounter the ground first, or at least fall across either one of the
conductors and the U blade if the conductor was positive then a shunt trip
would occur. Note; this is not an exact quote.

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