[Caution the basic statement I made is incorrect read the later post]
Sam,
One note to add to Don's coments is when a GFCI recp. is used where there is no ground available the test button will not work. This is because the test button uses the ground to inject a 5 miliamp ground fault to make the unit trip. I once had a GFCI that a coustomer requested to have replaced because the test button did not work, well the first two new units did the same thing and then I found the ground to be broken on the last box just up stream from the GFCI. Live and learn.
Dave T.
[This message has been edited by gto6t7 (edited 01-05-2001).]
