Which condition can cause increased earth leakage in a circuit?

Increased earth leakage in a circuit occurs when there is an unintended path for current to flow to the ground, which can pose serious safety risks. Moisture intrusion or insulation failure is a primary factor that can lead to this condition. When moisture enters a circuit, it can compromise the insulation material that is designed to keep electrical components apart. Wet insulation can significantly lower its resistance and allow current to leak through the moisture to the ground.

Additionally, insulation failures, such as cracks or breakdowns in the material, can create similar paths for leakage currents. This situation can increase the risk of electric shock or short circuits. It highlights the importance of maintaining proper insulation and protecting circuits from moisture to ensure safety and reliability in electrical systems.