An electrical contact switch for use in an electrical contactor, the electrical contact switch comprising: first and second electrical terminals (14, 16); an electrically-conductive busbar in electrical communication with the first electrical terminal; at least one fixed electrical contact which is attached to the electrically-conductive busbar; an electrically-conductive moveable arm in electrical communication with the second electrical terminal; at least one moveable electrical contact (26a, 26b) which is attached to the electrically-conductive moveable arm to form an electrical contact set with the fixed electrical contact; a fixed ferromagnetic element positioned at or adjacent to a side of the electrically-conductive moveable arm proximate the second electrical terminal; and a moveable ferromagnetic element in physical communication with a side of the electrically-conductive moveable arm which is opposite to the fixed ferromagnetic element; wherein, in a closed condition of the electrical contact set, the electrically-conductive moveable arm induces a magnetic field in the fixed and moveable ferromagnetic elements (30, 32), the moveable ferromagnetic element being magnetically attracted towards the fixed ferromagnetic element by the magnetic field to thereby increase a contact pressure on the electrical contact set characterized in that the electrically-conductive moveable arm is formed from a flexible electrically-conductive material, the moveable ferromagnetic element is formed as a plate which is cantilevered about a pivot point where it is connected to the electrically-conductive moveable arm and the second terminal, the moveable ferromagnetic element including a projection at a distal free end thereof facing the electrically-conductive moveable arm to effect physical contact therebetween. first and second electrical terminals (14, 16); an electrically-conductive busbar in electrical communication with the first electrical terminal; at least one fixed electrical contact which is attached to the electrically-conductive busbar; an electrically-conductive moveable arm in electrical communication with the second electrical terminal; at least one moveable electrical contact (26a, 26b) which is attached to the electrically-conductive moveable arm to form an electrical contact set with the fixed electrical contact; a fixed ferromagnetic element positioned at or adjacent to a side of the electrically-conductive moveable arm proximate the second electrical terminal; and a moveable ferromagnetic element in physical communication with a side of the electrically-conductive moveable arm which is opposite to the fixed ferromagnetic element; wherein, in a closed condition of the electrical contact set, the electrically-conductive moveable arm induces a magnetic field in the fixed and moveable ferromagnetic elements (30, 32), the moveable ferromagnetic element being magnetically attracted towards the fixed ferromagnetic element by the magnetic field to thereby increase a contact pressure on the electrical contact set characterized in that the electrically-conductive moveable arm is formed from a flexible electrically-conductive material, the moveable ferromagnetic element is formed as a plate which is cantilevered about a pivot point where it is connected to the electrically-conductive moveable arm and the second terminal, the moveable ferromagnetic element including a projection at a distal free end thereof facing the electrically-conductive moveable arm to effect physical contact therebetween.