Which test measures leakage current in medical devices?

Which test measures leakage current in medical devices?

• A. Dielectric withstand
• B. Insulation resistance
• C. Leakage current
• D. Grounding integrity

Answer: (C)

Measuring leakage current focuses on how much current escapes from energized parts to the patient or to earth during normal operation. That is the purpose of the leakage current test. In medical devices, strict limits are specified so any stray current remains well below what could cause harm, and the test uses a meter to quantify that current under defined conditions. Dielectric withstand checks insulation strength by applying a high voltage to push insulation to its breakdown point, which helps detect insulation failures under stress but isn’t about measuring the usual leakage during normal use. Insulation resistance tests gauge how much current would leak through insulation by measuring resistance at a set voltage, giving a resistance value rather than a direct leakage current under normal operation. Grounding integrity verifies that the protective earth path is continuous, ensuring safe fault conditions, but it doesn’t measure leakage current itself.

Measuring leakage current focuses on how much current escapes from energized parts to the patient or to earth during normal operation. That is the purpose of the leakage current test. In medical devices, strict limits are specified so any stray current remains well below what could cause harm, and the test uses a meter to quantify that current under defined conditions.

Dielectric withstand checks insulation strength by applying a high voltage to push insulation to its breakdown point, which helps detect insulation failures under stress but isn’t about measuring the usual leakage during normal use. Insulation resistance tests gauge how much current would leak through insulation by measuring resistance at a set voltage, giving a resistance value rather than a direct leakage current under normal operation. Grounding integrity verifies that the protective earth path is continuous, ensuring safe fault conditions, but it doesn’t measure leakage current itself.