This video features 100 kW, 480/240/208VAC, X100 Load Bank, produced by Mosebach Manufacturing. This video shows a detailed description of the proper operating procedures for the X100.
6:00 someone had the forethought to put banana jacks on there. If you use the right type of multimeter leads, you won't be taking the huge chance you are sticking bare probes in 480V live terminals (with bare hands even). e.g. www.arbiter.com/images/catalog/safety_banana.jpg That's not legal where I live luckily. Why they would have those is silly anyways- you can see the volts on the display.