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The insulation volume resistance test verifies that the amount of leakage current from a wire sample is within the acceptable range for a particular application by determining the resistivity of the insulation sample.
The test sample is submerged in a tap water bath within 250mm of each end. A DC voltage is applied between the water bath and the test sample for one minute, and the insulation resistance is measured. Measurements are used to calculate the insulation volume resistivity.