The electricity that comes from your electricity company comes from the pole, into the home, where it connects to your fuse panel or breaker box. Inside the box the electricity is distributed to individual circuits, which are protected by a fuse or a breaker. Most electric devices such as a portable stereo, lamp or your mobile phone plug only require a 15 amp circuits, while other smaller appliances such as a toaster, hair dryer or drill need a 20-amp circuit. Heavy duty appliances like dryers, dishwashers or refrigerators need anywhere from 30 to 50 amp dedicated circuits and a double pole breakers is used to safeguard the appliance. a dedicated line provides power to just one. It runs from the electrical outlet to the electrical panel and is used to power items that require much voltage.