A switch comprising: first and second terminals (111, 121) to connect a source of power to a load; a shaft rotatable about a central axis and moveable longitudinally along the central axis, the shaft having a wing extending out orthogonally from the central axis; a contact plate to physically and electrically connect the first and second terminals (111, 121) when the shaft is moved longitudinally along the central axis; a disengagement ramp to contact the wing when the shaft is rotated about the central axis, the disengagement ramp to force the shaft to move longitudinally along the central axis as the shaft is rotated to move the contact plate away from the first and second terminals (111, 121); characterized in that the switch further comprises: an engagement ramp to contact the wing when the shaft is rotated about the central axis, the engagement ramp to force the shaft to move longitudinally along the central axis as the shaft is rotated to move the contact plate towards the first and second terminals (111, 121); the engagement ramp including a recessed portion to retain the wing and prevent the shaft and the contact plate from moving longitudinally along the central axis away from the first and second terminals (111, 121); and a contact spring disposed between the wing and the contact plate, the contact spring biased to force the contact plate into engagement with the first and second terminals (111, 121) when the wing is in the recessed portion of the engagement ramp. first and second terminals (111, 121) to connect a source of power to a load; a shaft rotatable about a central axis and moveable longitudinally along the central axis, the shaft having a wing extending out orthogonally from the central axis; a contact plate to physically and electrically connect the first and second terminals (111, 121) when the shaft is moved longitudinally along the central axis; a disengagement ramp to contact the wing when the shaft is rotated about the central axis, the disengagement ramp to force the shaft to move longitudinally along the central axis as the shaft is rotated to move the contact plate away from the first and second terminals (111, 121); characterized in that the switch further comprises: an engagement ramp to contact the wing when the shaft is rotated about the central axis, the engagement ramp to force the shaft to move longitudinally along the central axis as the shaft is rotated to move the contact plate towards the first and second terminals (111, 121); the engagement ramp including a recessed portion to retain the wing and prevent the shaft and the contact plate from moving longitudinally along the central axis away from the first and second terminals (111, 121); and a contact spring disposed between the wing and the contact plate, the contact spring biased to force the contact plate into engagement with the first and second terminals (111, 121) when the wing is in the recessed portion of the engagement ramp. an engagement ramp to contact the wing when the shaft is rotated about the central axis, the engagement ramp to force the shaft to move longitudinally along the central axis as the shaft is rotated to move the contact plate towards the first and second terminals (111, 121); the engagement ramp including a recessed portion to retain the wing and prevent the shaft and the contact plate from moving longitudinally along the central axis away from the first and second terminals (111, 121); and a contact spring disposed between the wing and the contact plate, the contact spring biased to force the contact plate into engagement with the first and second terminals (111, 121) when the wing is in the recessed portion of the engagement ramp.