What is the typical insulation resistance value for new wiring?

The typical insulation resistance value for new wiring is indeed around 100 megohms. This high level of insulation resistance is crucial for ensuring safety and functionality in electrical systems. Insulation resistance measures how effectively the insulation around the conductor prevents electrical leakage, which could lead to short circuits, equipment damage, or fire hazards. A value of 100 megohms indicates that the insulation is in excellent condition, providing adequate protection and minimizing the risk of current flowing through unintended paths.

In practice, values below this standard can signal potential issues, such as moisture ingress, insulation degradation, or physical damage to the wiring. These lower values could lead to increased risk of failures and compromised safety.

Understanding that different components or applications might have varying insulation resistance requirements helps stress the importance of rigorously testing new installations. Aiming for that high benchmark of 100 megohms ensures the reliability of the system and minimizes the potential for electrical faults over time.