How 'bout dem Panthers!
Sooo... the consensus here is ring circuits are a violation (tho probably ok for LV despite it) of the NEC for parallel conductors, they are used mostly in the UK, which is a failed superpower because their breaker panels are too small, everyone still loves AFCI breakers, and receptacles should always be installed ground pin down.
Phew, tough work throwing all of that gasoline (petrol) on the fire!
kwired and SceneryDriver, I could see where a ring circuit here would throw electricians for a loop, so to speak. Even if there were no safety problems, I doubt a GFCI receptacle would work if both Line and Load side were essentially wired to line side. and I could see where mismarked cables, panels changes. or wiring failures might create a whole slew of other potential problems with a ring circuit
infinity's idea of cutting the circuit mid-point is maybe the best code compliant idea thus far.
and iwire; the driver is 300W, so it is capable of putting out 25A@12V. I know the amperage is what kills but I think I'd rather put my hand across a 12V 1000A battery than a 50A 240V range receptacle with the cover off.