Abstract: Electrical apparatus comprises a backplane board of dielectric material and at least one run of conductive material. An aperture extends through the dielectric material and through the run of conductive material. A conductor member may be connected to the run of conductive material by means of a connector comprising a first connector member secured to the conductor member and a second connector member that is mechanically mateable with the first connector member. One of the connector members has an essentially rigid elongate member of conductive material that is embedded in a block of dielectric material and can be inserted into the aperture from one side of the board to contact the run of conductive material and that, when so inserted, projects from the other side of the board. The block of dielectric material prevents inadvertent contact with the live electrical conductors of the backplane.