We are having our feeder wires disconnected at our service providers transformer for their maintenance. At this specific facility there is the main disconnect that goes to a gutter that feeds multiple panels and transformers. My plan was to shut down all the disconnects that are connected to existing equipment, then all breakers in use and then shut down each main breaker, then shutdown the panel board main then reverse the procedure when power is restored. Are there any other suggestions? I want to establish a companywide protocol.