UL LISTED NEMA L5-30P male plug, twist lock style blades, rated for 30A, 125V. Mounts onto 3-wire 8-14 AWG Cable. NEMA L5-30P Locking Plug KEEP OUT DEBRIS/ MOISTURE: Built with rubber grommet inside, gives moisture and dirt protection for different sizes of cords. SAFE ENOUGH: The contacts are in plastic housings without wrapping wires around screws, slide each wires into an individual tube and tighten, prevent shorting or stray strands. IGHTLY LOCK: Screw down stress relief section, secure locking on generator to keep it from vibrating loose and falling out. BUILT TO LAST: UL Listed, Well-conductive copper parts and Nylon bases construction are rugged and durable for dependable use.