ITEM NAME:30Amp 125/250 Volt 3 Pole 4 Wire Grounding Lock Locking Male Plug L14 xiF Gw.1 x Locking Male Plug. Insulation resistance: AC 2000V 1 Minute. Great for connecting to a generator with a 120/240 volt outlet. Durable in use. Dielectric strength: OVER 100M MIN at 500V DC. Current: 30A.