Editing Direct current (section)

===Domestic and commercial buildings===
[[File:Direct current symbol.svg|right|200px|thumb|This symbol which can be represented with [[Unicode]] character {{U+|2393}} (⎓) is found on many electronic devices that either require or produce direct current.]]
DC is commonly found in many [[extra-low voltage]] applications and some [[low voltage|low-voltage]] applications, especially where these are powered by [[battery (electricity)|batteries]] or [[solar power]] systems (since both can produce only DC).

Most [[electronics|electronic]] circuits or devices require a DC [[power supply]].

Domestic DC installations usually have different types of [[Jack (connector)|sockets]], [[DC connector|connectors]], [[switch]]es, and [[Light fixture|fixtures]] from those suitable for alternating current. This is mostly due to the lower voltages used, resulting in higher currents to produce the same amount of [[Watt|power]].

It is usually important with a DC appliance to observe polarity, unless the device has a [[diode bridge]] to correct for this.