Joe,
Generic field marking for arc flash hazards is fine, but I don't like the idea of posting specific incident energy and PPE information on the equipment. There is too much of a chance that the information will be outdated when someone uses it to choose the PPE. I also don't think that safe work rules belong in the NEC. It is an installation code, not a safe work code.
The electricians here have been provided with 1000 volt gloves and 8 cal/cm shirts and pants. Level 2 hoods are also provided for use as needed. A number of Level 4 suits and hoods have been purchased for the rare cases where they would be required. The main rule is that you do not work anything hot except for troubleshooting. The main use of the PPE will be when you verify that the power is off after locking it out. Under the safety rules, you must assume that it is still live until tested with a voltage tester. You are exposed to the live equipment when testing for voltage and PPE is required.
Don
