I pre-rated the HT800,  which I just ordered, based on my HT700 which I fried.  I bypassed rule #1 when plugging in/adjusting my 50 amp boat cable to the dock electric tower by not killing the breaker at the tower.. Actually, the plug was already in and functioning for a week but somehow came partially undone.  When I attempted to rotate the plug back to its original position I heard the heater blower on the boat pick up speed, followed by a popping sound.  It appears I fed 220 volts into one side of the cable feed. I killed the main breakers and noticed a burnt odor.  I slowly repowered everything only to discover the TV, Blu-Ray player, & Wi-Fi repeater plugged into the HT700 would not power up.  I finally traced the odor to the HT700 which was out of sight high on a shelf.  Bypassed the HT700 and fortunately all items attached to it are functioning.  The HT700 evidently took quite a surge and thus protected at least five hundred dollars of electronics.
I pre-rated the HT800,  which I just ordered, based on my HT700 which I fried. I bypassed rule #1 when plugging in/adjusting my 50 amp boat cable to the dock electric tower by not killing the breaker at the tower.. Actually, the plug was already in and functioning for a week but somehow came partially undone. When I attempted to rotate the plug back to its original position I heard the heater blower on the boat pick up speed, followed by a popping sound. It appears I fed 220 volts into one side of the cable feed. I killed the main breakers and noticed a burnt odor. I slowly repowered everything only to discover the TV, Blu-Ray player, & Wi-Fi repeater plugged into the HT700 would not power up. I finally traced the odor to the HT700 which was out of sight high on a shelf. Bypassed the HT700 and fortunately all items attached to it are functioning. The HT700 evidently took quite a surge and thus protected at least five hundred dollars of electronics.