SmartPlug 30 AMP SmartPlug/Twist Type Cordset w/Carry Case - 50 [C30503]30 AMP SmartPlug Twist Type Cordset with Carry Case 50' For many years boaters have experienced the safety, security and simplicity of SmartPlug products on the boatside while still dealing with the same old issues created by legacy twist type products on the dockside. Those days are changing with the introduction of SmartPlug's new dockside product offering. SmartPlug has applied decades of experience and customer feedback to create a product that