No, there is not a main breaker in the panel. What you see just to the right of the transformer is a 400A fused disconnect which is just ahead of the 800A MLO circuit breaker panel. It contains (4) 200A breakers that feed other panels throughout the building as well as 20A 2 pole breakers that feed MH lighting. This electrical work was done by an EC hired by the building owner. I was hired by the tenant to install conduit/conductors and connect their equipment. I will get more pics tomorrow to give everyone a better overview of this situation.
