Lose a power feed: does the hall stay up?
The Power page tests the loss of feed A, then feed B, and reports whether the hall carries on.
Try this in the lab: Power event drillAbout the AI Data Centre
Transcript
On the Power page, Test loss of feed A is pressed. The result says the hall carries on and shows how loaded the busiest PDU on the other feed would be. The same test is run for feed B.