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2. Voltage converter - Wikipedia

   en.wikipedia.org/wiki/Voltage_converter

   Most single phase alternating-current electrical outlets in the world supply power at 210–240 V or at 100–120 V. A transformer or autotransformer can be used; (auto)transformers are inherently reversible, so the same transformer can be used to step the voltage up, or step it down by the same ratio.

3. AC adapter - Wikipedia

   en.wikipedia.org/wiki/AC_adapter

   Plug-in adapters equipped with USB receptacles are widely available to convert 120 VAC or 240 VAC power or 12 VDC automotive power to 5 VDC USB power (see photo at right). The trend towards more-compact electronic devices has driven a shift towards the micro-USB and mini-USB connectors, which are electrically compatible in function to the ...

4. Electric power conversion - Wikipedia

   en.wikipedia.org/wiki/Electric_power_conversion

   In North America and northern South America, it is usually 120 volts, 60 hertz (Hz), but in Europe, Asia, Africa, and many other parts of the world, it is usually 230 volts, 50 Hz. [2] Aircraft often use 400 Hz power internally, so 50 Hz or 60 Hz to 400 Hz frequency conversion is needed for use in the ground power unit used to power the ...

5. DC connector - Wikipedia

   en.wikipedia.org/wiki/DC_connector

   The Saf-D-Grid [21] connector delivers up to 600 VDC at up to 30 A, with the connector occupying the same space as an IEC 320 C13/C14 connector normally limited to 250 VAC at 10 A. The connector can also be disconnected under load.

6. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   They are also found on some RVs for connecting to shore power. RVs in the US are equipped for 120 V 30 A or 240 V 50 A service, and use a cord to connect to a receptacle at the campsite, usually on a power pedestal with one or more receptacles providing 120 V 30 A (TT30R), 240 V 50 A (14-50R), or 120 V 15/20 A (5-20R) service.

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