Currently all my racks are each wired with one run, so they are all on with parts of the rack unoccupied. I am looking to wire them in sections so that I can cut power to a few levels at a time when needed. How do most people do this? Do each set of rows get their own power cord and then have a powerstrip plugged in to the thermostat, or is there a way to daisy chain them kind of like christmas tree lights?