Posted by John T on February 05, 2014 at 04:58:34 from (71.0.64.117):
In Reply to: Ground prong?? posted by Greg1959 on February 04, 2014 at 17:49:55:
I cant tell you in which year or which edition of the NEC the third GroundING wire was required, but if I had an appliance with an outer metallic conductive case/shell, I would install and use a 3 wire cord and 3 wire GroundING plug and receptacle with the Green GroundING wire attached to the metal case AS IT COULD SAVE YOUR LIFE!!!!
When I attended a National Electrical Code Seiminar (Instructor was Joe McPartland or Mike Holt if I recall) they advised we install outlets with the GroundING terminal on top because if something (say a necklace etc) dropped down and the plug wasn't fully inserted, the Ground wire would be the first to make contact.
GFCI became a requirement after the three wire plug and receptacle requirement, two different things and designs going on with those.
John T Long retired Electrical Engineer and rusty on latest codes
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