3 phases feeding a factory-wired strip assembly ( with five conductor Molex snaps ) is standard for West Coast Safeway Stores.
Savings on the neutral wiring...
EE sizes the string such that field wiring of #10 mates to factory stranded #12...
Neutral not oversized since the bulk of the return is just the harmonics: the phases are balanced enough for this to be true.
The only trip-outs will be due to collision or original installation miss-wire.
These days the circuit normally passes through a smart controller racked right into the distribution boards. Cutler-Hammer, Square D, GE, et. al. are building these solutions as a canned package.
Circuit fault concerns are deemed inconsequential relative to the benefits and energy savings.
For what it's worth.
