What does a low insulation resistance reading usually indicate?

A low insulation resistance reading typically indicates a developing fault within the insulation of a circuit. Insulation resistance is a crucial parameter that reflects how well the insulating material is preventing current from leaking through to the ground or other conductive surfaces. When insulation resistance is low, it suggests that there may be degradation, moisture infiltration, or other factors compromising the integrity of the insulation, which can lead to current leakage or short circuits over time.

In environments where electrical systems operate under stress or are subject to environmental factors like temperature and humidity changes, regular monitoring of insulation resistance is essential. A consistent low reading serves as an early warning sign to address potential issues before they escalate into complete failures or hazardous conditions.