We are supposed to treat all equipment energized until proved otherwise by testing for absence of voltage. This means that even though we have secured any source of energy feeding a given enclosure, in order to perform the verification test we want to don the proper PPE before opening the enclosure and only after confirming absence of energy we can remove our PPE.

My dilemma is this: "how do you perform verification of absence of energy for a piece of equipment that falls under the hazard category of DANGER (i.e. greater than category 4)?" Since there is no adequate PPE for accessing this cabinet, how am I supposed to test for absence of energy?