The Frostex 9800 FlexFit kit provides the specially designed plug you need to plug one Frostex heating cable into an electrical outlet. The built-in power cord eliminates the need for extra heating cable from the pipe to the outlet. The plug features a power indicating signal light for a fast indication that the Frostex heating cable has power applied. Local and national electrical codes require that heating cable circuits are protected by ground-fault circuit breakers, to help ensure this, and to lower installed cost,, each Frostex 9800 plug has integrated 30 mA ground-fault protection.