Thorsman CYB-PS triple master socket 37° white NCS. All CYB sockets feature enhanced touch protection. The master and slave sockets are installed without a box. This system consists of a triple master socket that can be expanded with any number of double slave sockets. The combination is completed with an end piece that simply plugs between the side of the socket and the front cover. Marking, termination, and strain relief are done at the master socket.