Switchboard multifunction terminal block for connecting electrical wires (2,2a), comprising - an insulating body formed by a substantially closed-ring frame and configured so as to define at least a top side and a bottom side, opposite in a vertical direction (Z-Z), and at least two respective flanks opposite in a longitudinal direction (X-X); inside the body there being formed: - a first pair of seats outermost in the longitudinal direction (X-X) towards the flanks, symmetrical with respect to a vertical central axis (Z-Z), open in the transverse direction (Y-Y) and during use communicating with the exterior via a first respective opening extending in the vertical direction (Z-Z) to the top side of the frame; the seats being adapted to house means for gripping wires which can be inserted longitudinally into the seats from the frame flanks; - a first space centred on the vertical central axis (Z-Z) and bounded in the longitudinal direction (X-X) by respective first partitions extending in the vertical direction (Z-Z) and vertically interrupted along a heightwise section so as to allow the insertion, in the transverse direction (Y-Y), of a longitudinal conductor lamina designed to restore the electrical continuity between the wires, said first partitions being spaced from each other in the longitudinal direction (X-X) by an amount such as to define a size of the space suitable for housing a jumper of the screw type; the front face of the terminal block having a first central opening for forming a communication with the exterior of the first space for insertion of the respective screw jumper via the front side accessible to the operator; wherein said longitudinal conductor lamina has a first central hole with female thread designed to mate with the threading of the screw of the jumper, and a pair of polygonal-shaped openings symmetrically arranged on opposite sides of the central hole relative to the vertical central axis, characterized in that it comprises: - a pair of second spaces respectively arranged symmetrically on opposite sides of the first space relative to the vertical central axis (Z-Z), each second space being bounded in the longitudinal direction (X-X) by respective second partitions extending in the vertical direction (Z-Z) and interrupted in the same direction along a heightwise section such as to allow the insertion of the conductor lamina in the transverse direction (Y-Y); the partitions being spaced in the longitudinal direction (X-X) from the first partitions by an amount such as to define a size of each second space allowing housing of a respective jumper of the type with spring lugs, and in that the top side of the terminal block has an undercut with a base; said first central opening being formed on that base; the base has two second lateral openings symmetrically arranged on opposite sides of the central opening relative to the vertical central axis (Z-Z); wherein each of the two openings forms a communication with the exterior respectively, of a respective one of said pair of spaces, for inserting the respective jumper with spring lugs in the vertical direction (Z-Z) from the top side accessible to the operator, and in that said central hole and openings of the longitudinal conductor lamina are respectively coaxial with the central space and the lateral spaces respectively for engagement with the screw of a screw-type jumper and with the lugs of a respective spring jumper. - an insulating body formed by a substantially closed-ring frame and configured so as to define at least a top side and a bottom side, opposite in a vertical direction (Z-Z), and at least two respective flanks opposite in a longitudinal direction (X-X); inside the body there being formed: - a first pair of seats outermost in the longitudinal direction (X-X) towards the flanks, symmetrical with respect to a vertical central axis (Z-Z), open in the transverse direction (Y-Y) and during use communicating with the exterior via a first respective opening extending in the vertical direction (Z-Z) to the top side of the frame; the seats being adapted to house means for gripping wires which can be inserted longitudinally into the seats from the frame flanks; - a first space centred on the vertical central axis (Z-Z) and bounded in the longitudinal direction (X-X) by respective first partitions extending in the vertical direction (Z-Z) and vertically interrupted along a heightwise section so as to allow the insertion, in the transverse direction (Y-Y), of a longitudinal conductor lamina designed to restore the electrical continuity between the wires, said first partitions being spaced from each other in the longitudinal direction (X-X) by an amount such as to define a size of the space suitable for housing a jumper of the screw type; - a pair of second spaces respectively arranged symmetrically on opposite sides of the first space relative to the vertical central axis (Z-Z), each second space being bounded in the longitudinal direction (X-X) by respective second partitions extending in the vertical direction (Z-Z) and interrupted in the same direction along a heightwise section such as to allow the insertion of the conductor lamina in the transverse direction (Y-Y); the partitions being spaced in the longitudinal direction (X-X) from the first partitions by an amount such as to define a size of each second space allowing housing of a respective jumper of the type with spring lugs,