All things being equal and in a non-lethal event, 480 would cause more pain. But dead is dead at any voltage.
In the US, both 220 and 480 require at least 2 hot conductors. Someone should never be hit by these voltages because you should never have 2 hot conductors in your hands at the same time.
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From a three phase four wire distribution system the voltages would be as follows. From L1 to N - 277 volts. From L2 to N - 277 volts. From L3 to N - 277 volts. From L1 to L2 - 480 volts. From L2 to L3 - 480 volts. From L3 to L1 -480 volts.
NO, the 480 Volts Y -- is 4 wire system, with three wires which are hot legs @ 480 volts between each three hot legs. A mid tap is a neutral leg (ground) the white wire. Which gives 277 volts between it and any of the three hot legs. so a 4wire 480 volt Y system. Gives 480 /277 volts.
Yes, but the 600 volts would have to be transformed down to 480 volts. Direct connection to the motor with 600 volts would overheat the motor to destruction.
480 volts and 60ohm impedence current = volt/impedence current=480/60 current=8ampeares
Commercial lighting. In a facility where 3 phase 480 volts is needed for machinery, 277 is also readily available because each leg of 480 to ground is 277 volts. This way numerous supply transformers are not needed in a commercial building.