Electrical contacts Electrical contacts An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers. Each contact is a piece of electrically conductive material, usually metal. When a pair of contacts touch, they can pass an electrical current with a certain contact resistance, dependent on surface structure, surface chemistry and contact time; when the pair is separated by an insulating gap, then the pair does not pass a current. When the contacts touch, the switch is "closed"; when the contacts are separated, the switch is "open". The gap must be an insulating medium such as air,
Electrical Artificer Electrical Artificer An Electrical Artificer (EA) is an electrical technician competent in the electrical maintenance of ship's machinery such as engines and generators. This was originally a Royal Navy term for those trained and competent in the installation and maintenance of ships electrical systems. The title has been replaced in the Royal Navy . However the Irish Naval Service continues to use the term 'Electrical Artificer' (EA) for electrical technicians. A distinctive propeller insignia is worn to identify these personnel. Training is completed in the National Maritime College which is incorporated into the Cork Institute of Technology. Prior to its