What causes a motor to overload?

How do you check motor overload?
How do you troubleshoot a motor overload?
prevention of motor from overload
symptoms of motor overload
rotor lock
pull out torque
shafts misalignment
poor ventilation
higher ambient temperature
under Design
Phase loss
bearing failure
frequently On and off
nuisance tripping
fluctuating power supply
aging of motor
poor lubrication
wrong operation against duty cycle
#overload
#rotorlock
#pullouttorque
#shaftsmisalignment
#poorventilation
#higherambienttemperature
#underDesign
#Phaseloss
#bearingfailure
#nuisance tripping
fluctuating power supply
#ageing
poor lubrication
wrong operation against #dutycycle
#phase