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View Full Version : What is difference between GFI and AFI breakers


trkengbn
Sep 25, 2010, 05:38 PM
Explain difference between GFI and AFI breakers

donf
Sep 25, 2010, 06:42 PM
A GFCI is designed to prevent a "Fault" current from killing or maiming a person.

A GFCI breaker looks for a change in current (0.6) between the Neutral and Hot conductors.

An AFCI breaker is designed to watch for the electric signature of an arc. It's purpose to to avert a possible fire.