A:Answer Hi BBallMAF, thank you for your question. Our GE UltraPro 8-Outlet Surge Protector has a voltage protection rating of (L-N, L-G) 400V, (N-G) 500V. If you have any further questions, please feel free to give us a call between the hours of 7:00 AM – 8:00 PM Central Standard Time, Monday through Friday at 1-800-654-8483. Thank you.