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A power cord, line cord, or mains cable is an electrical cable that temporarily connects an appliance to the mains electricity supply via a wall socket or extension cord. The terms are generally used for cables using a power plug to connect to a single-phase alternating current power source at the local line voltage (generally 100 to 240 volts ...
Britain pre-war had used a combination of 2A, 5A, and 15A round pin sockets. In an appendix to the main report (July 1944), the committee proposed that a completely new socket-outlet with a fuse in the plug to protect an appliance's flexible cord should be adopted as the "all-purpose" one socket and plug domestic standard.
The 15 A outlet has a wider earth pin than the 10 A outlet. The 20 A outlet has a wider earth pin and wider Line and Neutral pins. The 25 A outlet has an inverted L-shaped earth pin and wider Line and Neutral pins. The 32 A outlet has a sideways U-shaped earth pin and wider Line and Neutral pins.
Plugs and power cords have a rated voltage and current assigned to them by the manufacturer. Using a plug or power cord that is inappropriate for the load may be a safety hazard. For example, high-current equipment can cause a fire when plugged into an extension cord with a current rating lower than necessary.
A variety of different kinds of IEC 60320 plugs and sockets. IEC 60320 Appliance couplers for household and similar general purposes [1] is a set of standards from the International Electrotechnical Commission (IEC) specifying non-locking connectors for connecting power supply cords to electrical appliances of voltage not exceeding 250 V (a.c.) and rated current not exceeding 16 A. [1 ...
1.1 These requirements cover cord-connected, relocatable power taps rated 250 V AC or less and 20 A AC or less. A relocatable power tap is intended only for indoor use as a temporary extension of a grounding alternating-current branch circuit for general use. National Electrical Code recognizes power strip as Multioutlet Assembly in Article 380.
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