Hi. We bought a house with a separate small guest house about 30 yds away, the guest house being added more recently. they are billed for electricity as one bill on the same meter which is on a line pole with a transformer that is near the guest house. the main house has a circuit breaker mains on its board, the guest house has an internal box without a mains on it and a mains on the outside of the house. turning off either mains switch affects only that house. since they are on the same meter, if both mains are on should a powerline adapter work in the guest house? the main house has dsl internet and a wireless router. thanks.