Editing AC power plugs and sockets (section)

=== Travel adaptors ===
[[File:Type M travel adaptor.jpg|thumb|upright|A travel adaptor for "Type M" (16&nbsp;A [[SANS 164#SANS 164-1|SANS&nbsp;164-1]]) sockets from South Africa]]

[[Adaptors]] between standards are not included in most standards, and as a result they have no formal quality criteria defined. Physical compatibility does not ensure that the appliance and socket match in frequency or voltage. Adaptors allow travellers to connect devices to foreign sockets, but do not change voltage or frequency. A [[voltage converter]] is required for electrical compatibility in places with a different voltage than the device is designed for. Mismatch in frequency between supply and appliances may still cause problems even at the correct voltage. Some appliances have a switch for the selection of voltage. Many modern devices use AC adapters that accept 100–240 V voltage at 50 or 60&nbsp;Hz, meaning they can be used anywhere in the world as long as a suitable plug adapter is used.
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