WAGO Terminal block connector, power distribution, barrier strip

 A terminal block is a screw-type electrical connector where the wires are clamped down to the metal part by a screw. It is a connector which allows more than one circuit to connect to another circuit.

https://www.futureelectronics.com/p/interconnect--terminal-blocks-barrier-strips--euro-style/221-413-ve00-2500-wago-6062746