Electrical Safety

My answer is a two part answer: 1. TESTING: Motors are tested originally at the factory under certain load and RPM conditions. It is unlikely you have exactly the same conditions in your application. So, testing a new motor at home may produce different results from the original factory test. You should discuss this with a test engineer at the factory. Not a sales engineer, not an application engineer, not a design engineer, but a TEST engineer. 2. SUPERIOR REPAIR: Rebuilt motors often have superior specifications compared to the original delivered specifications. A good example is insulation material which can be a lot better than the original materials. Of course, a lot depends on how old your motor is.