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2. Electrical outlet tester - Wikipedia

   en.wikipedia.org/wiki/Electrical_outlet_tester

   A receptacle tester being used to check for some types of improper wiring of an outlet. For this particular tester, proper wiring is indicated by the two yellow lights. The outlet tester checks that each contact in the outlet appears to be connected to the correct wire in the building's electrical wiring. It can identify several common wiring ...

3. British telephone socket - Wikipedia

   en.wikipedia.org/wiki/British_telephone_socket

   In the UK, however, many telephone circuits still have an anti-tinkle connection between the master socket and extensions on a third wire. But such a 3-wire interface is not the symmetric interface needed for balanced twisted-pair transmission lines, and therefore prone to electromagnetic interference and crosstalk with nearby other wiring. It ...

4. powerCon - Wikipedia

   en.wikipedia.org/wiki/PowerCon

   These are most often used as power inlets on professional audio, video, and lighting equipment. Power outlets (light grey) are used to daisy-chain LED based luminaires, and panels forming a "video wall" during concerts. These are used in both 120 and 230 volt countries, so the user must ensure supply and load voltages match.

5. Extension cord - Wikipedia

   en.wikipedia.org/wiki/Extension_cord

   Yellow NEMA 5-15 extension cord NEMA-1 extension cord, common in the United States Extension cord reel (Germany). An extension cord (US), extension cable, power extender, drop cord, or extension lead (UK) is a length of flexible electrical power cable (flex) with a plug on one end and one or more sockets on the other end (usually of the same type as the plug).

6. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   NEMA 5-15P plug and NEMA 5-15R receptacle (different scales, blade spacing is 0.5 inches (12.7 mm) for both.) Each receptacle also accepts an ungrounded plug, whether polarized or unpolarized. Typical 5-15R residential receptacle 5-20R T-slot receptacle mounted with the hole for the ground pin at the top. The neutral connection is the wider T ...

7. Electrical connector - Wikipedia

   en.wikipedia.org/wiki/Electrical_connector

   A blade connector is a type of single wire, plug-and-socket connection device using a flat conductive blade (plug) that is inserted into a receptacle. Wires are typically attached to male or female blade connector terminals by either crimping or soldering. Insulated and uninsulated varieties are available.