What is the range of insulation resistance acceptable for new emergency generators according to NETA standards?

The acceptable range of insulation resistance for new emergency generators according to NETA standards is indeed between 75 to 150 Megohms. This range is established to ensure that the insulation is adequately robust to prevent electrical leakage, enhancing the safety and reliability of the generator. High insulation resistance indicates that the insulation material is in good condition, which is crucial for preventing potential electrical faults that could lead to equipment failure or safety hazards.

Other ranges provided do not meet the specific requirements outlined in the NETA standards for new emergency generators. For instance, values that are lower might indicate insufficient insulation integrity, potentially compromising the generator's operation and safety, while higher values could exceed the practical measurement capabilities for standard insulation testing methods without significant added benefit. This is why the specified range of 75 to 150 Megohms is considered optimal for new installations, ensuring they operate safely within recognized industry standards.