Finally, if receptacle boxes are PLASTIC, and we're using ROMEX, the ONLY change is that IGR's are not necessary - because the boxes are plastic, there is no grounding requirement for the boxes.
This leaves TWO possibilities for wiring - one is to do a "home run" for each and every outlet, each receptacle gets its own romex. The ground connects to the frame of the receptacle, you make sure a second receptacle in the box doesn't touch its neighbor, and the romex ground ONLY connects to the receptacle ground at the box and to the STAR point (which is bonded to system ground) at the panel.
The second way would allow daisy-chaining of the romex conductors between plastic outlet boxes, EXCEPT that it would require a SEPARATE, INSULATED, ground wire to be run from each receptacle in each box straight to the STAR point; still no IGR's required as long as multiple receptacles in a box do NOT TOUCH each other. This isn't hard to do, just a caution that it's necessary. The downside of this is the hassle of having to run all the romex runs in the same set of holes through studs, PLUS that pesky FMC full of separate, INSULATED, star ground wires.
This is why the simplest (maybe not quite the cheapest) way for star grounding with plastic boxes is the first one.
Electrically, the graphic posted by Bryan is the one to go by - hopefully my long-winded explanation above will help figure out HOW you can accomplish this, and it's all in one place - if more gets added that I may have omitted, I can edit this post to include it - eventually, we can add it to the stickies here so it's easier to locate... Steve
PS - when I finally find the code language for the "proximity of ground conductors" thing, I'll add that too -
Ok, Stuart read the above.
1) I am using plastic boxes with 14-2 wire(tree conductors)
2) I have a 100 amp sub panel off my main panel upstairs.
3) The electrician also ran a seperate GROUND wire and rod outside the studio in the dirt,but i noticed it is bonded to the Ground in Subpanel.
So what i did was run three circuits to control room and three circuits to the live room.
Two of the circuits in each room have 2 outlets on them.
Then i join the ground cables for the two outlets togather and then at the subpanel to the ground bar.
Is that not good ,i am still a little unclear