Electrically it makes no difference wether the x1-x3 connection or the x2-x4 is. This is not the cause of your problem.
Solenoid type testers (i.e. wiggy)have been known to cause GFIs to trip, especially if connected line to ground or neutral to ground.
Now, when you say you are getting a voltage to ground reading where are you measuring it?
From the transformer to the mounting panel?
From the transformer to the enclosure?
From the transformer to building steel?
From the transformer to earth?
It is possible that the transformer is mounted on a painted metal panel, which is mounted into a painted metal enclosure, which is mounted on painted steel channels, the result of all this paint is a poor ground connection. If this is the case then use a grinder to remove the paint at each bounding connection.
[This message has been edited by JBD (edited 07-12-2002).]
