An apparatus for use in securing an electrical connection, said electrical connection being formed by a mating structure including prongs (128, 130) of a male assembly, the prongs including a ground prong maintained at ground potential, and receptacles (102, 104) of a female assembly, wherein said electrical connection is broken by withdrawal of said prongs from said receptacles, said apparatus comprising: a first housing portion of said female assembly, said first housing portion housing at least a first receptacle (102, 104) having an end at a stationary first front surface of said first housing portion said stationary first front surface having an opening formed therein in alignment with said first receptacle such that a prong can be inserted into said first receptacle via said opening; a clamping element including first and second clamping surfaces moveable between a clamping configuration wherein said first and second clamping surfaces clamp on first and second opposite sides respectively, of the ground prong of said male assembly, and a release configuration; wherein said clamping element holds said mating structure in a connected state in said clamping configuration, and a withdrawal force tending to withdraw said prongs from said receptacles causes angular deflection of said clamping element such that said withdrawal force concomitantly urges said first clamping surface against said first side of said prong and urges said second clamping surface against said second side of said prong; characterized in that the apparatus further comprises a release element extending from said first front surface at a location spaced from said opening such that said release element is accessible by a user when said male and female assemblies are in a connected state; wherein said release element is moveable in relation to said first front surface relative to an axis of said first receptacle between a clamping configuration and a release configuration and said mating structure is secured in a connected state in said clamping configuration. a first housing portion of said female assembly, said first housing portion housing at least a first receptacle (102, 104) having an end at a stationary first front surface of said first housing portion said stationary first front surface having an opening formed therein in alignment with said first receptacle such that a prong can be inserted into said first receptacle via said opening; a clamping element including first and second clamping surfaces moveable between a clamping configuration wherein said first and second clamping surfaces clamp on first and second opposite sides respectively, of the ground prong of said male assembly, and a release configuration; wherein said clamping element holds said mating structure in a connected state in said clamping configuration, and a withdrawal force tending to withdraw said prongs from said receptacles causes angular deflection of said clamping element such that said withdrawal force concomitantly urges said first clamping surface against said first side of said prong and urges said second clamping surface against said second side of said prong; characterized in that the apparatus further comprises a release element extending from said first front surface at a location spaced from said opening such that said release element is accessible by a user when said male and female assemblies are in a connected state; wherein said release element is moveable in relation to said first front surface relative to an axis of said first receptacle between a clamping configuration and a release configuration and said mating structure is secured in a connected state in said clamping configuration. a release element extending from said first front surface at a location spaced from said opening such that said release element is accessible by a user when said male and female assemblies are in a connected state; wherein said release element is moveable in relation to said first front surface relative to an axis of said first receptacle between a clamping configuration and a release configuration and said mating structure is secured in a connected state in said clamping configuration.