Translations:Switch/2/en

Switches are used to safely turn on and off AC and DC circuits. This can be useful for not only lighting, but also to switch off appliances that remain continuously plugged in. Switch designs vary between countries, but the overall concept remains the same for most residential circuits: a switch opens and closes the ungrounded conductor of a circuit to determine whether there is a complete circuit or not. The other conductor of a circuit is not switched, it is only necessary to switch one conductor as this breaks the circuit. As switch designs vary between countries, the proper method for wiring and installing switches will vary.