On Sat, 22 Jun 2019 at 02:28, marc marc <marc_marc_...@hotmail.com> wrote:
socket key is probably the most successful but for charging stations, > the information is missing if it is a plug or a plug at the end of a > cable on the terminal side. > Terminology gets messy. Different parts of the world and different industries give the terms different meanings. 1) Contact shape. For most common connectors, there is an analogy between contact shape and sexual organs, so male contacts go into female contacts. By some definitions, male contacts = plug, female contacts = socket, regardless of other factors (but see point 2). 2) Fixed or free. Fixed connectors are receptacles. The free connector is often known as a plug, regardless of the contact style. In the US the fixed connector is also known as a jack whereas in the UK it's the fixed connector that is known as a jack. The term "jack" should be avoided. By some definitions, fixed connector = socket, free connector = plug, regardless of other factors (but see point 1). 3) It is possible for the fixed receptacle (a socket as per definition 1) to have male contacts (a plug as per definition 2). See https://en.wikipedia.org/wiki/Gender_of_connectors_and_fasteners#Electrical_and_electronic where it shows a female VGA receptacle and a male DE-9 receptacle. Both are chassis- mounted D-type connectors, one with male contacts the other with female contacts. Are they both sockets (as per point 2) or one plug and one socket (as per point 1)? 4) Generally, the side of a connector pair that carries dangerous voltages should be female to make it harder for somebody to accidentally touch live parts. However, it is possible to get connectors with shrouded male contacts. So the free connector of a power supply to have female contacts (a socket as per point 1) it might have shrouded male contacts (a plug as per point 1). 5) You can get hermaphroditic connectors. Not only are the contacts hermaphroditic, but so are the housings. https://en.wikipedia.org/wiki/Anderson_Powerpole and http://www.edac.net/product-details-233-case-study-6 It may be better to tag them as connector=* rather than socket=* or plug=* because even experts (in different fields of the electrical/electronic industry and or different countries) will disagree on whether something is a plug or socket. -- Paul
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