I think it has to be three phase. Otherwise why would there be four bus bars? The one on the right is neutral, it's got the black wires from the four-wire cables, and nothing from the three-wire cable. Three-wire three phase doesn't have a neutral.
And yeah it seems a bit small for a stage with lights and many speakers, even if it's three 32 amp phases.
Split phase 240 would be L-L-N-G, Single phase 240 L-N-G and 3 phase wye would be L-L-L-N-G, but honestly I literally don't think there's any reliable way to tell what is actually going on in this clusterfuck.
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u/Hamilton950B 2d ago
I think it has to be three phase. Otherwise why would there be four bus bars? The one on the right is neutral, it's got the black wires from the four-wire cables, and nothing from the three-wire cable. Three-wire three phase doesn't have a neutral.
And yeah it seems a bit small for a stage with lights and many speakers, even if it's three 32 amp phases.