2. You are performing an insulation resistance test on a 480V, ungrounded, 3∅, Wye Generator with a Fluke 1507 insulation resistance tester. From the choices below which one represents a good insulation resistance test?a. A-B 50 MΩ, A-C 48 MΩ. C-B 51 MΩb. A-Ground 50 MΩ, B- Ground 52 MΩ, C- Ground 49 MΩc. A- Neutral 2 MΩ, B- Neutral 0 MΩ, C-Neutral 0 MΩd. All combinations above Infinite.
The answer is : b
33 years experience electrical troubleshooting industrial equipment and control systems.