Originally Posted by SOB
I have no experience with grounding a kettle but I do have some experience with grounding electrical devices...
Wouldnt grounding the element to the kettle do nothing if the kettle was not also grounded? I would ground them both (element and kettle) to a ground bus that is tied in with your ground for your power source...
If the insulator on the element itself some how cracks or exposes the conductor in the element to the wort, the pot will be exposed to voltage. With out it being grounded it will float until something or some one touches it. If the kettle was grounded it would pop a breaker or gfci because the current has an alternate path.
A couple of options. You could drill and tap the base of the element on the outside to insert a ground screw. It would have to be pretty shallow and probably not the best way to do it, better than JB weld though.
You could do the copper tab as suggested earlier.
Drill a hole toward the upper lip of the pot and run a stainless bolt through there with an O-ring. I wouldn't put it right above the element though. If you do it at the bottom you have to get a seal good enough to resist the head pressure of the liquid in the pot.
Best option would be to weld or braze a flat head screw face down onto the pot, giving you a mounting point.