How is a permanently installed generator tested during a semiannual inspection?

The process of testing a permanently installed generator during a semiannual inspection involves several critical steps to ensure the reliability and efficacy of the system. Turning the power off to the Automatic Transfer Switch (ATS) is key because it simulates a power outage. This test allows the generator to start up as it would in a real-world scenario, verifying that it can handle the load and ensuring that the ATS properly switches back to the utility power when it is restored.

By performing this action, technicians can confirm that the generator not only powers up correctly but also that it supplies the necessary power during an outage, effectively mimicking the operational conditions it would face in an emergency. This thorough testing confirms that the generator is functioning reliably and can be depended upon in critical situations.