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Schematic symbols for male and female connector pins. In electrical and mechanical trades and manufacturing, each half of a pair of mating connectors or fasteners is conventionally designated as male or female, [1] a distinction referred to as its gender. [2] The female connector is generally a receptacle that receives and holds the male connector.
NEMA 1-15P (two-pole, no ground) and NEMA 5-15P (two-pole with ground pin) plugs are used on common domestic electrical equipment, and NEMA 5-15R is the standard 15-ampere electric receptacle (outlet) found in the United States, and under relevant national standards, in Canada (CSA C22.2 No. 42 [1]), Mexico (NMX-J-163-ANCE) and Japan (JIS C 8303).
This is surrounded by a circular shroud on the male connector, which fits into a matching recess on the female connector. The standard defines connectors with 3, 4 and 5 pins, but a non-standard variant with 7 pins (6 in a circle plus one in the centre) is commercially available; [ 6 ] this can be used for star-delta starting of three-phase motors.
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 ...
The corresponding notch in the female connector body is 1.8 ± 0.1 mm (0.071 ± 0.004 in) wide and ends at a radius of 6.2 ± 0.1 mm (0.244 ± 0.004 in) from the connector centre. With the angles measured clockwise looking at the female connector (counter-clockwise looking at the male), the various key positions indicate:
The two standards were initially adopted because up to the second half of the 20th century in many regions of Italy electricity was supplied by means of two separate consumer connections – one for powering illumination and one for other purposes – and these generally operated at different voltages, typically 127 V (a single phase from 220 V ...