I just had an inspection, he wants the #8 around the pool but no distance was mentioned, he wanted any metal attached to it, ladder ground from lights etc.
He also wanted a in water ground plate, he said usually in the skimmer attached to it.
I took a sheet of copper 12x12 folded it into 3x4 square drilled a hole thru it and the skimmer box where its below water level attached a lug to the #8
that #8 wire is then mounted to a rebar in the concrete curb of the enclosure but I suppose a ground rod would do.
Never said anything about tying in the motor ground.