Headaches can lead to scalp pain and to pain in any area of the face, neck or head. Several types of headaches may cause scalp pain, such as migraine, sinus headache, tension headache, and those caused by nerve involvement such as occipital neuralgia.
The circuit breaker. The circuit breaker does the same job as the fuse, but works in a different way. A spring-loaded push switch is held in the closed position by a spring-loaded soft iron bolt. An electromagnet is arranged so that it can pull the bolt away from the switch.
Large breakers that provide 30, 40, or 50 amps are double-pole breakers that have double-size levers. These supply 240-volt appliances, like electric ranges and dryers. A large breaker may also supply a feeder circuit that brings power to a small circuit breaker panel, called a subpanel, somewhere else in the house.