The NAC3FX-W-TOP is a 20 amp Locking female cable connector with screw terminals. The powerCON TRUE1 True Outdoor Protection (TOP) is a locking 20 Amp true mains connector for outdoor applications. It replaces appliance couplers wherever a very rugged solution in combination with a locking device is needed in order to guarantee a safe power connection. The powerCON TRUE1 True Outdoor Protection (TOP) is a connector with breaking capacity (CBC), i.e. it can be connected or disconnected under load or live.