It sounds like you have a equipment grounding conductor touching a grounded(neutral) conductor somewhere in the circuit. That is what is causing the gfci to trip. All equipment grounding conductors within a box, shall be spliced together, no exceptions.
Rick Miell
How does everyone read 250.148 concerning tieing installed egc together or to the box? Does this mean we have to ground the box in every instance, or, if the wires are spliced together, that is all that is needed?
[This message has been edited by rmiell (edited 11-14-2002).]
