Look at the GFCI you are replacing. Kitchens and bathrooms should always have 20 amp gfci outlets. However, you must be using number 12 wire for 20 amp gfci or regular outlets If your wiring is number 14 guage then use a 15 amp. So, the wire size and breaker size together should be rated for 20 amps!

How do I know if I need a 15 or 20 amp outlet?

Tip: The easiest way to determine whether a circuit is 15 or 20 amps is to look at the corresponding breaker or fuse in the breaker panel. Dedicated circuits are electrical lines that carry an electrical current to one single outlet.

Whats the difference between a 15 amp and 20 amp GFCI?

There are different pin configurations for 15a and 20a receptacles. A 20a receptacle has one slot that is turned sideways or T shaped to allow a 20amp plug to be used. A 15amp receptacle wont overload the circuit.

What causes GFCI to trip?

Circuit overload occurs when more amperage flows through an electric wire or circuit than it can handle. This may happen if you connect malfunctioning or defective appliances. Loose, corroded wires or connections may also be to blame. Once the GFCI outlet senses an overload, it trips or breaks the circuit.