The term “Mains” or “Mains Voltage” refers to the electrical power that is delivered to homes and businesses and it is the form of electrical power that consumers use when they plug domestic appliances, televisions and electric lamps into wall outlets. Power in the home can be thought of as a network of multiple devices connected together on the same AC voltage line. Since these devices are on the same power network, the devices can affect one another. Therefore, it is important that there is proper isolation between the devices.