The parts of the couplers are defined in the standard as follows. Couplers described under these standards have standardized current and temperature ratings. Interconnection couplers allow a power supply from a piece of equipment or an appliance to be made available to other equipment or appliances. Terminology Īppliance couplers enable the use of standard inlets and country-specific cord sets which allow manufacturers to produce the same appliance for many markets, where only the cord set has to be changed for a particular market. The first edition of IEC 320 (later renumbered IEC 60320) was published in 1970. The standard uses the term coupler to encompass connectors on power cords and power inlets and outlets built into appliances. Unlike IEC 60309 connectors, they are not coded for voltage users must ensure that the voltage rating of the equipment is compatible with the mains supply. Different types of connector (distinguished by shape and size) are specified for different combinations of current, temperature and earthing requirements. IEC 60320 Appliance couplers for household and similar general purposes 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.
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