JD, I just cant from sitting here know exactly whats going on with those heaters.
Normally straight 240 volt appliances (i.e. NO 120 loads) ONLY require the two hots L1 & L2 (red and black 240 VAC) plus the bare/green equipment GroundING conductor so no Neutral white wire isnt even used
You asked "IS the bare ground wire not carrying the service ground current back to the panel????"
ANSWER the bare ground wire does not normally carry any current whatsoever. Its a dedicated isolated conductor for carrying FAULT CURRENT ONLY
The white Neutral is for carrying return current for 120 volt loads AND AGAIN ISNT USED FOR STRAIGHT 240 LOADS
HOWEVER you indicate the heaters have provision for all 4 wires, 2 hots (red black) White Neutral and bare/green equipment ground and if thats so and the inspectors approve it who am I to say (NOT being there) if thats right or wrong?????
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