The use of IGs at all is controversial at best.
To do it the 'best way' no you may not have more than one outlet per IG conductor and that conductor has to go all the way back to the point that the electrical system is bonded.
Most times I do not see it done this way, at best there will be separate IGs back to the first panel where an IG terminal bar will be installed and from that point a single conductor is run back to the bonding point.
Do it however your job specifications allow, however I agree with Roger and Curt an IG outlet in a plastic box in a wood frame building does nothing that a standard outlet will do.
To satisfy the job requirements go ahead and put the IGs in but you will have to use a metal box or the special plastic bonding boxes as has already been said.
Strictly speaking you can not use 12/3 for this, remarking the red for use as the IG is a violation.
Bob
[This message has been edited by iwire (edited 07-18-2004).]
