The Collaborative International Dictionary
Binding post \Bind"ing post`\ (Elec.) A metallic post attached to electrical apparatus for convenience in making connections.
Wikipedia
A binding post is a connector commonly used on electronic test equipment to terminate (attach) a single wire or test lead. They are also found on loudspeakers and audio amplifiers as well as other electrical equipment.
A binding post contains a central threaded metal rod and a cap that screws down on that rod. The cap is commonly insulated with plastic and color-coded: red commonly means an active or positive terminal; black indicates an inactive (reference or return) or negative terminal; and green indicates an earth (ground) terminal.
Commonly designed in a style called five-way or universal, such binding posts allow the connection of several different types of connections:
- Banana plugs, inserted into the open end of the binding post
- Pin connectors, inserted into a hole drilled through the metal post and clamped by the screw-down portion of the binding post.
- Bare wire inserted through the same hole and clamped, or
- Wrapped around the metal post and clamped.
- A lug terminal inserted around the metal post and clamped.
The binding post was a commercial invention of the General Radio Corporation.
Usage examples of "binding post".
The crowd went into a frenzy as the guards pulled the pirate free of his binding post and dragged him from one instrument of torture to another.
An insulated ground wire led from a binding post on the radio set, out the window and down-probably to the water well alongside the hotel, which would make the best possible ground.