Originally Posted by
Perito
8FLA means "8 Full Load Amps". Full Load Amps is the amount of current that is drawn when a motor is running at its rated horsepower. Think of this as "running amps".
18 LRA means "18 Locked Rotor Amps." Locked Rotor Amps is the amount of current that is drawn when the motor is attempting to start. Think of this as "starting amps".
Space is always a consideration. Nevertheless, if you can find a relay rated at 25% more than the one you have, it'll probably last for many years.