Orerofsirhc
Member
Does anyone know what is the difference between full load amps and running amps is? or where i can find the definition for the two?
Does anyone know what is the difference between full load amps and running amps is? or where i can find the definition for the two?
Now run a big log through the blade and start cutting. The amperage might double. That's your Full Load Amps
Full load amps is what the motor will draw at its rated voltage, speed, frequency and horsepower.
No that might be FLA but much more likely it would be RLA.
As kwired said
While pushing the log through you could, and likely will exceed the HP rating.
The running current is exactly that...the current that the motor draws when running and is a variable number based on the applied mechanical load. The FLA is the nameplate amps for the purposes of overload protection and the "table" amps for the purposes of sizing the motor circuit conductors and the short circuit and ground fault protection.
You are not permitted to use the nameplate FLA or RLA for sizing short-circuit and ground-fault protection of motors unless the motor is built for speeds less than 1200 RPM or high torques, or for multi-speed motors. NEC 430.6(A)(1) requires the use of the full-load current (FLC) values listed in Tables 430.247, 430.248, 430.249, and 430.250.
If you will read my post again I thing you will find that I said to use the nameplate value for the overload protection and the "table" value for the conductor sizing and short circuit and ground fault protection. Maybe my use of the word table in quotes was not clear, but it was intended to mean the tables at the end of Article 430.
Does anyone know what is the difference between full load amps and running amps is? or where i can find the definition for the two?
In the hydraulics business, that is less true. It is not terribly unusual to draw FLA frequently in a machine cycle. We have "horsepower controls" (really torque controls which become HP controls at constant speed) which adjust the pump dynamically (reducing flow once the torque maximum setting at maximum pressure is reached); these will often sit at FLA for extended periods.IMO FLA is an ideal number that will rarely be seen in the field, we use it only to size the OLs.
Few applications require the specific HP the motor is rated for.