In article on Thu, 23 Jul 2009
23:32:52 -0400, blueman wrote:

Any idea what could be happening here?
Why would both the old and new GFI show as being wired correctly and
yet fail to trip?


Your GFIs, both old and new, are fine. On a GFI, the tester built-in to
the receptacle works by shunting some current from hot to neutral.

Your hand held tester works a little differently - it shunts some
current from hot to ground. Either there is a grounding problem on that
circuit, or the hand held tester itself is faulty.

--
Seth Goodman