Originally Posted by rod734
I have the three wires comming in from my service, plus a grnd wire comming from my grnd rod, but the ground and the neutral are going to the same place in the 200 amp box. I dont understand the differance between neutral and ground. I can see that the neutral carries currant on the 110 circuit but it goes to ground. Do I need to iscolate my ground from my neutral in my main box and run a ground to my gfci to make it work properly.
No you don't need to isolate at the panel. I'm not sure what the actual code is on this. I know if the sub panel is outside the structure of the main panel, like a detached garage, another grounding rod must be installed.
I'm sure you'll be fine if you tie in the ground and neutral at the sub.
Heres a picture I kinda drew up, I'm not sure if I completely understand what your trying to do. So does this look right?
Sorry the pic looks like ass I'm using linux and the paint program isn't very good.