This paper introduces a new technique for condition monitoring of motor control centres, to define the motor status and reduce the failure rate of AC motors. Motor stresses defined , and categorized into loading stresses and supply stresses and then two factors are introduced to assess the motor condition, loading stress factor and supply stress factor, using these two factors a reliable motor index is introduced, which defines well the motor status and helps the plant operator to develop an effective predictive and preventative maintenance program. An intelligent fuzzy logic motors condition monitoring system is developed , MATLAB/Simulink model is built to simulate the proposed system.