Abstract: A male coupling connector has a first half male portion and a second half male portion, which are hinged together between open and closed positions. A female coupling connector has a first half female portion and a second half female portion, which are hinged together between open and closed positions. The female connector is sized to be slidably positioned and securely interconnected about the male connector in a closed position at assembly, to enclose an in-line electrical plug and socket therein. Ridges and grooves extend in parallel, side by side relation about the outer circumference of the first and second half male portions. Ridges and grooves extend in side by side relation about the inner circumference of the female connector. The ridges and grooves on the male coupling connector interlock with the ridges and grooves on the female connector portion. The male coupling connector is pivotally closed and releasably secured about a portion of the in-line electrical plug and socket.