240 with a high leg is very common in this area.
Two of the 240 corner grounded delta have been on an elementary school and a private school that was formerly an orphanage. Both had small a\c loads - split systems and small rooftops -no chillers. Both systems served lights and receptacles.
3 pole main disconnect with a solid plug in the grounded phase. 3 wires in and 3 wires out.
