Which of the following is not required by NETA for new 4160V AC induction motors?

In the context of NETA (National Electrical Testing Association) standards for new 4160V AC induction motors, requirements such as efficiency rating, insulation resistance, and temperature rise are critical for ensuring the performance, safety, and reliability of these motors. Efficiency ratings are vital because they indicate how well the motor converts electrical energy into mechanical energy, which impacts operational costs and energy consumption. Insulation resistance is essential to ensure that the motor can withstand electrical stresses without catastrophic failures caused by faulty insulation, while temperature rise testing is important to assess how much heat the motor generates during operation, which can affect longevity and performance.

Power factor, while an important characteristic of motors in terms of electrical efficiency and system performance, is not explicitly required by NETA for new 4160V AC induction motors in the same manner as the other metrics. Power factor refers to the ratio of real power flowing to the load, compared to the apparent power in the circuit, and while it has implications for the motor’s performance and can affect the efficiency of the entire electrical system, it is not a required testing parameter in the same way that efficiency rating, insulation resistance, and temperature rise are mandated. This distinction is what makes power factor the correct choice in this question.