A switching apparatus for electrical power systems, the apparatus comprising at least two sets of first and second electrical terminals , and further comprising, for each set of first and second terminals, a respective switch device and respective selector device connected in series between the respective first and second terminals, wherein the respective switch device is operable to make or break an electrical connection between the respective first and second terminals, and wherein the respective selector device is operable between a first state in which it electrically connects the respective switch device to the respective second terminal, and a second state in which it electrically isolates the respective switch device from the respective second terminal, the apparatus further comprising first and second separable support structures that, in an assembled state, provide a respective compartment for housing at least part of a respective switch device and corresponding selector device, each of said first and second support structures having a body formed from electrically insulating material, characterized in that in respect of each set of first and second electrical terminals, the apparatus includes a respective third electrical terminal , and wherein, in said second state, the selector device connects the respective second terminal to the respective third terminal, the apparatus further including a yoke comprising one or more electrically conductive member for electrically connecting the respective third terminals together, wherein the yoke is operable between a use state in which said one or more electrically conductive member engages with the third terminals and electrically connects them together, and a disengaged state in which the third terminals are not electrically connected together by the yoke and are exposed from the apparatus. wherein the respective switch device is operable to make or break an electrical connection between the respective first and second terminals, and wherein the respective selector device is operable between a first state in which it electrically connects the respective switch device to the respective second terminal, and a second state in which it electrically isolates the respective switch device from the respective second terminal, the apparatus further comprising first and second separable support structures that, in an assembled state, provide a respective compartment for housing at least part of a respective switch device and corresponding selector device, each of said first and second support structures having a body formed from electrically insulating material, characterized in that in respect of each set of first and second electrical terminals, the apparatus includes a respective third electrical terminal , and wherein, in said second state, the selector device connects the respective second terminal to the respective third terminal, the apparatus further including a yoke comprising one or more electrically conductive member for electrically connecting the respective third terminals together, wherein the yoke is operable between a use state in which said one or more electrically conductive member engages with the third terminals and electrically connects them together, and a disengaged state in which the third terminals are not electrically connected together by the yoke and are exposed from the apparatus. <EOS>