I won’t get into the specific proprietary nature of the test. Reviewing the test procedure resulted in a plan that combines running the motor to its rated temperature, stopping it as quickly as possible, Lockout/Tagout (LOTO) with verification, opening the conduit box, making a precise measurement with the equipment still hot.
This formal procedure was reviewed with engineering, management, electrical technologists and fitters. The plan was modified to ensure LOTO was complete before opening the conduit box, thus avoiding exposure to toxic energy for 2 people. The procedure was practiced without energy. Then the test procedure was successfully performed.
The very specific nature of this test and the memories associated with it resulted in the formal safety plan complete with review. The fact is, all potentially hazardous tasks should have a plan and the plan should be reviewed. As much as possible, live work should be avoided to ensure that no injury can take place.