Ideal Industries, Push in connectors Wire Splice Wire Splice Connector, Blue, Insulated 4mm²

The SpliceLine® in-line wire connector provides a crimp-free, solderless butt Splice.
Conforming to BS7671:2018, the two-port model accepts up to 4.0 mm2 solid wire allowing one connector to do the job of multiple through-crimps.
Its small size and tool-free application makes SpliceLine® the obvious solution for connecting wires in a broad range of applications, including prefabricated wiring, lighting and ring main circuits.
Electricians are often confronted with an existing wire that has been cut too short by the previous contractor to safely install a socket, light switch or lighting fixture. In these situations, it is often very difficult if not impossible to use a crimp tool due to space restrictions.
With SpliceLine® however, the short wire is simply pushed into one end of the connector with the extra length of wire being pushed into the other open end. It now takes less than 10 seconds to join two wires together.

IEC 60998: 32A | 450V | 105° C (working), UL 467C: 20A |600V | 105° C (working)
Wire range: 0.5mm2 - 4.0mm2 for solid (20-12 AWG) | 1.0 mm2 - 2.5 mm2 for stranded (16-12 AWG ≤19 strands) | tin bonded 18-14 AWG ≤19strands)
Transparent polycarbonate housing for visual inspection of connection
Wire Range Capacity: Solid - 12 to 20 AWG