An electrical distribution system includes a database manager using a query stack, comprising a panel with a plurality of remote operated devices mounted in the panel. Each remote operated device is for connection in a branch circuit to a load device. A panel controller is operatively connected to each of the remote operated devices. The panel controller comprises a programmed controller for controlling operation of the remote operated devices. A database is operatively associated with the programmed controller storing configuration data relating to operation of the remote operated devices. The panel controller is programmed to implement a database manager for accessing data in the database responsive to requests of the programmed controller, comprising storing a cache of data queries and responsive to a received request for data determining if a query relating to the received request is stored in the cache and returning the stored query, and operating the returned query to access data in the database.
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