A plug connection including a plug connector and a plug socket for electrically conductively connecting a circuit board. The plug connector has an insulating housing with a conductor insertion opening for guiding an electrical conductor into the insulating housing. A contact insert is received in the insulating housing, which has a busbar and a clamping spring. The insulating housing having a contact pin receiving opening for guiding a contact pin into the insulating housing. The busbar having a second clamping point for the contact pin. An actuating element is configured to open and/or close the first clamping point. An actuation of the actuating element is blocked by at least one of the insulating walls in an assembled state of the plug connector and the plug socket.

A conductor terminal having at least one insulating material housing; at least one contact insert arranged at least partially in the housing and having at least one contact piece and at least one clamping spring. The contact piece, together with the clamping spring, forms at least one conductor clamping point for an electrical conductor to be contacted via the conductor terminal, which electrical conductor can be acted upon by a spring force of the clamping spring. At least one actuating lever is pivotably supported in the housing for actuating the clamping spring. The actuating lever can be pivoted from a closed position to an open position and vice versa in relation to the housing and/or the contact piece and an electrical conductor inserted into the conductor terminal is not acted upon by the spring force of the clamping spring at the conductor clamping point at least in the open position.

A coupling arrangement 10 for reversibly mechanically and electrically coupling a terminal connector 200 to a circuit board arrangement 100 comprising, the circuit board arrangement 100, which contains a circuit board 110 and a connecting element 120 being mechanically connected to the circuit board 110. Hereby the connecting element 120 comprises at least one connecting unit 121, wherein each connecting unit 121 comprises a first electrical connection point 124 being electrically connected to the circuit board 110. Moreover, the coupling arrangement further contains the terminal connector 200 comprising at least one terminal connector unit 210 and a housing 205 for carrying the at least one terminal connector unit 210. In a mechanical connection state of the terminal connector 200 and the circuit board arrangement 100, the respective terminal connector units 210 and connecting units 121 are coupled, providing an electrical connection of the terminal connector 200 and the circuit board 110.

An operable wire connector comprises an insulating housing (1), an operating handle (2) rotatably mounted inside the insulating housing (1), a transmitting piece (3), an electric conductor (4), an elastic clamping piece (5) with a fixed portion (51) connected to the electric conductor (4) and an elastic free portion (52) resisted by the transmitting piece (3), and a cover (6) assembled with the insulating housing (1); an adjustable gap is formed between the elastic free portion (52) and the electric conductor (4) for receiving a wire, and the gap will continuously be present due to the action of a rotation limiting portion (12). The operating handle (2) is pulled reversely, so that the wire comes into contact with the electric conductor (4); when the user pulls and turns up the operating handle (2) again, there is no need to continuously use force, and the wire will be take out easily.

A connection terminal for connecting at least one electrical conductor includes: a clamping element which is arranged on a receiving element so as to be able to pivot about a shaft between an open position and a clamping position, the clamping element forming, together with a contact element, a clamping point for the electrical conductor; and an actuating arm for receiving an actuating tool, a first free limb of the actuating arm being pivotally arranged on the clamping element so as to be spaced apart from the shaft thereof such that, by pivoting the actuating arm using the actuating tool, the clamping element is able to shift from the open position into the clamping position and vice versa. A second free limb of the actuating arm is movably guided over at least one cam.

An electrical connection terminal includes: a connection terminal housing having a conductor insertion opening; a busbar arranged in the connection terminal housing; a spring element rotatably mounted in the connection terminal housing and pivotable into an open position and into a closed position, a conductor inserted into the conductor insertion opening being clampable against the busbar by the spring element in the closed position; and an actuation element rotatably mounted in the connection terminal housing and by which the spring element can be actuated for transfer into the open position and into the closed position. The actuation element includes a base body, which has a tool insertion opening, and an actuation arm. The base body and the actuation arm are formed in two parts, the actuation arm being formed pivotally movable relative to the base body.

A socket has a housing, which is composed of an electrically insulating material and an elongate plug-receiving region. A contact spring is arranged in the plug-receiving region. A lever loads the contact spring in the open position of the lever such that a dimension of the contact spring transverse to the longitudinal direction of the plug-receiving region is reduced and relaxes the contact spring in the closed position of the lever. A plug is provided for such a socket.

A conductor terminal includes at least one insulating-material housing, at least one contact insert arranged at least partially in the insulating-material housing that has at least one contact piece and at least one clamping spring. The contact piece with the clamping spring forms at least one conductor clamping point for an electrical conductor to be contacted by the conductor terminal, which electrical conductor can be acted upon by a spring force of the clamping spring. At least one actuating lever is pivotably supported in the insulating-material housing for actuating the clamping spring. The actuating lever can be pivoted from a closed position to an open position and vice versa in relation to the insulating-material housing and/or the contact piece. An electrical conductor inserted into the conductor terminal is not acted upon by the spring force of the clamping spring at the conductor clamping point at least in the open position.

A connection clamp for connecting at least two electrical conductors to one another, having an insulating housing with at least one first and one second conductor insertion opening that are arranged on mutually opposite sides of the insulating housing. A first spring-force clamping connection for electrically contacting a first electrical conductor inserted through the first conductor insertion opening and a second spring-force clamping connection for electrically contacting a second electrical conductor inserted through the second conductor insertion opening are provided. The first spring-force clamping connection is electrically connected to the second spring-force clamping connection via a bus bar. The first spring-force clamping connection has at least one first clamping spring for clamping the first electrical conductor against a first clamping point of the bus bar, the second spring-force clamping connection has a clamping leg for clamping the second electrical conductor against a second clamping point of the bus bar.

An electrical cable connecting system includes a modular electrical or electronic wiring device assembly, in which an electrical or electronic wiring device and a connector may be electrically coupled via pig-tail jumper electrical wires. The connector may be coupled to cable electrical wires fitted with a cable protector to protect the electrical wire conductors therein. The connector may include internal electrical terminals for electrically coupling building electrical cable wires with corresponding jumper electrical wires. The connector may be mechanically and electrically coupled to and directly terminate one or more building electrical cables, which may provide power to or from one or more electrical or electronic wiring devices by establishing an electrical pathway from a source of electrical power, through the building electrical cable wires, the connector, the pig-tail jumper electrical wires and an electrical or electronic wiring device.