Nickel plated contacts with self-cleaning field-proven pressure bands for smooth pin insertion, low heat rise, corrosion resistance, and quality electrical performance. #10-#2 AWG, 30A, 347/600V Individual silicone sealing grommets with cord diameter range makes for faster, easier assembly. Four Pole, Five Wire, Grounding Mechanical cord clamp with silicone grommet seal and locking screw ensures a positive and watertight strain relief system.