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2. Twist-on wire connector - Wikipedia

   en.wikipedia.org/wiki/Twist-on_wire_connector

   End view showing metal inserts Twist-on connectors used in a junction box Twist-on wire connectors. Twist-on wire connectors are a type of electrical connector used to fasten two or more low-voltage (or extra-low-voltage) electrical conductors. They are widely used in North America and several European countries in residential, commercial and ...

3. Rat-tail splice - Wikipedia

   en.wikipedia.org/wiki/Rat-tail_splice

   A rat-tail splice, also known as a twist splice or a pig-tail splice, is a basic electrical splice that can be done with both solid and stranded wire. It is made by taking two or more bare wires and wrapping them together symmetrically around the common axis of both wires. The bare splice can be insulated with electrical tape or by other means.

4. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   Neither NEMA nor the US National Electrical Code nor the Canadian Electrical Code specify a preferred orientation, but the National Electrical Contractors Association's National Electrical Installation Standards (NECA 130-2010) specify that the preferred location of the ground is on top. When the ground blade of a receptacle is on the bottom ...

5. Aluminum building wiring - Wikipedia

   en.wikipedia.org/wiki/Aluminum_building_wiring

   As of 2014 there was only one twist-on connector rated or "UL Listed" for connecting aluminum and copper branch circuit wires in the U.S., which is the Ideal no. 65 "Twister Al/Cu wire connector". These special twist-on connectors have a distinctive purple color, have been UL Listed for aluminum to copper branch circuit wire connections since ...

6. Electrical connector - Wikipedia

   en.wikipedia.org/wiki/Electrical_connector

   The movable (less fixed) connector is classified as a plug (denoted P), [37] designed to attach to a wire, cable or removable electrical assembly. [38] This convention is currently defined in ASME Y14.44-2008, which supersedes IEEE 200-1975 , which in turn derives from the long-withdrawn MIL-STD-16 (from the 1950s), highlighting the heritage of ...

7. Screw terminal - Wikipedia

   en.wikipedia.org/wiki/Screw_terminal

   The wire may be wrapped directly under the head of a screw, may be held by a metal plate forced against the wire by a screw, or may be held by what is, in effect, a set screw in the side of a metal tube. The wire may be directly stripped of insulation and inserted under the head of a screw or into the terminal.