To confirm this is a 240v 1ph Chili?
M&R flashes don't come with a plug, just a whip for your electrician to install the correct nema plug. You can look up the correct twist lock based off the phase, breaker size and voltage.
On our 20x24 3ph Chili we can run it on either a 40a circuit (technically correct for it's fla) or a 30a circuit since it never pulls enough to trip the 30a. This is 3ph 230v however.