What Happened?

Here's what we know, the U.S.S. Nimitz was in port. When the ship is in port, they will hook the ship up to power lines from the shore. P.J.'s group was testing a 120 volt line using a "Fluke" branded meter. The meter they were using was designed to test 120 volt sources, with a capacity to support a 500 volt spike. The line however was powered up to 4,160 volts. The meter of course couldn't handle that amount of electricity and exploded. When the meter exploded, the metal casing of the meter was blown into an exposed electrical panel bus bar. That panel was engergized with 4,160 volts. The metal of the case created an un-fused link between the positive and negative bus bars of the panel. This created a plasma ball much like a lightning strike which caused severe heat and fire. PJ was supervising a crew of three other men. This included two other naval personnel and a civilian assigned to work for the Navy.
PJ was standing directly behind the person administering the test.