Every switch and socket model serves a particular purpose, and knowing about these essential functionalities helps users make an informed purchase. Industrial plugs and electrical sockets are connection units where electrical devices of high voltage ratings can be plugged in. There are just three types of surface switches that are used to control light fixtures: simple single-pole (On & Off) switches, three-way switches, and four-way switches. All of these types come in various operating techniques, including toggle, rocker, and push-button.