This may belong in another forum.You have a jacuzzi tub in a bathroom,residential.One situation has copper pipes throughtout the house and the other situation has all plastic plumbing EXCEPT the fuacets on the jacuzzi,copper.By code,INCLUDING the lug on motor,what is the grounding procedure here?Bouncing across state lines here and trying to keep alot of inspectors happy?Latest fella wanted one from service to motor only in situation number 2.