Psssst. . .
GFI is a technology to protect humans, not equipment. If it detects more current going in than coming out, it knows current is escaping through another route and could be dangerous. It responds by switching off.
"Ground Fault Interruption" shortened to GFI is easier to say than "Holy #&(@&$# that thing's alive!"
Cheers, PW.
P.S. When I first read your message, I envisioned some poor guy getting a shock "in his equipment" and thought to myself -- that would hurt.
After a second reading, I realized that there may be some confusion between GFI and Surge Protection.
News 
Market Data 
Discover 
