Insulation Resistance Requirements Between The Two Poles Of A Wall Switch Socket

During factory testing and routine inspections, the insulation resistance between the two terminals of the Wall Switch socket is set at ≥5MΩ. This represents the resistance value of the insulation material between the two conductors. If the insulation resistance is too low, leakage current or a small conductive path may occur between the conductors.

Measuring insulation resistance is a typical electrical isolation test. This type of test applies a certain DC voltage to the two terminals of the socket, measures the leakage current flowing through the insulation material, and then calculates the resistance value according to Ohm's law. A reading higher than 5MΩ reflects that the insulation material has good dielectric properties under dry and normal use conditions. If it is lower than this value, there may be hidden dangers such as conductive impurities, insulation aging, poor materials, or insufficient structural gaps.