Dave:
The situation you explained is:
1: Dangerous
2: Wrong.
Using the high leg for a line-to-neutral circuit is 100% wrong, and dangerous.
The QO CB is rated for 120 volt to neutral/ground, not 200+.
The lights have to be connected either 120 volts, or 240 volts, based on your available voltages. Using 120 volt will result in an approx 2700 watt load, 22.5 amps, and should be on #10, based on 125% for a continuous load.
The high leg is NOT to be used for line/neutral circuit, only line-line (240 volt), single or three phase circuits.
BTW, the QO cb should be discarded in the trash. HID lighting requires a HID labeled breaker. (QO's are usually HID labeled)
John
