Would you feel comfortable making a decision on putting an anchor down on a cable if you knew it would only take out a few hundred houses worth of power.

I would imagine that any body that issues you a license should inform you to not anchor in proximity to cables, regardless of size / spec etc. if you put an anchor down on a charted cable, and the cable is where it should be, I think you’d be responsible for the cost of damage.

I anchor very carefully on the rocks or sandy seabed. I don’t anchor in seaweed areas and on pipes or cables. Additional attention from local newspaper is not desired.