What is the acceptable insulation resistance value for a newly installed 4160V emergency generator according to NETA standards?

The acceptable insulation resistance value for a newly installed 4160V emergency generator, according to NETA standards, is 100 Megohms. This value is based on industry best practices that ensure the reliability and safety of electrical equipment. A minimum insulation resistance of 100 Megohms indicates that the insulation material is intact and functioning properly, providing adequate protection against faults that could lead to short circuits or equipment failures.

Insulation resistance testing is a crucial maintenance procedure used to evaluate the condition of electrical insulation, prevent equipment damage, and ensure safe operation. Values significantly above this minimum threshold could indicate excellent insulation condition, while values much lower might suggest a need for further inspection or repair. The choice of 100 Megohms aligns with the standards that recognize acceptable values while accounting for the operational voltage rating of the generator.