I'm trying to get a better understanding on how grounding, bonding, and earthing works when high voltage sources interact with lower ones. For example, if you have a 400V AC, 20V AC, and 5V DC source all stored in the same aluminum cabinet (surrounded by a faraday's cage and connected to earth), would there be any disadvantages to bonding the 400V source to the other low-voltage sources. In the scenario I'm looking at, all three sources are connected to external loads/ grounds. The 400V source connects to its load with much larger wires than the 20V AC and 5V DC sources... if the three are all bonded to each other, will there be any inductive concerns? Currently the 400V AC source is not bonded to anything however the 20V AC and 5V DC sources are bonded to each other without any issues; the insurance of having the 400V source also bonded would be nice however I'm leaning towards there being some issues with adding a much higher voltage source to the two lower ones.