I am installing a subpanel in a detached garage that is fed from the main house panel. There are labels for both "main disconnect" and "service disconnect" that came with the new subpanel. Am I correct to assume that the "main disconnect" label would be be the one to apply to the main breaker (that cuts off all power to the remaining breakers in the subpanel. Is the "service disconnect" label only to be used for the breaker/disconnect immediately downstream of the meter (which, in this case is the main house panel)?