Arc flash risk while opening doors and covers

Picture yourself standing in the electrical room of your employer's facility. In front of you are two 600-volt switchgear lineups positioned side by side. The manufacturer, type, bus rating, available fault current, arc flash incident energy levels and just about anything else you can think of are all identical. All except one thing... one switchgear lineup has hinged doors and the other has bolted covers. If you wanted to take a peek inside the equipment (a peek that would expose energized electrical conductors) would the risk of causing an arc flash be the same for each?

As with any assessment of risk, it always seems to depend on who you ask.

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