Thanks for the reply,
I'm looking at 680.25(b) which says
" An equipment grounding conductor shall be installed with the feeder conductors between the grounding terminal of the pool equipment panelboard and the grounding terminal of the applicable service equipment or source of a separately derived system. "
It doesn't specifically say that a separate insulated grounding conductor must be installed as it does in 680.23(F)(2)for a pool light.
Based on 344.60 RMC is approved as an equipment grounding conductor. It is not an insulated grounding conductor though.
680.25(b) continues on to say
" For other than existing feeders covered in 680.25(a), exception, or feeders to separate buildings that do not utilize an insulated equipment grounding conductor in accordance with 680.25(b)(2)this equipment grounding conductor shall be insulated"
