To measure the insulation resistance of equipment, disconnect all sides of the equipment to be measured, verify that there is no voltage, and confirm that no one is working on the equipment before proceeding.
To measure the insulation resistance of equipment, disconnect each side of the equipment to be measured, verify that there is no voltage, and confirm that the equipment is not working.
Measure the insulation resistance of equipment, disconnect each side of the measured equipment, verify that there is no pressure, and confirm that the equipment is not working.