Why would you perform a Hipot test?

• A. Check for good isolation between parts of a circuit
• B. Determine conductor resistance
• C. Measure capacitance
• D. Check thermal rating

Answer: (A)

A Hipot test is about testing insulation to ensure proper isolation between parts of a circuit. By applying a high voltage between conductors (and/or to the enclosure or ground), it reveals weak insulation or leakage paths that could allow arcing or dangerous leakage current under normal operation. The idea is to stress the insulation beyond normal operating voltage to verify that it can safely prevent current from flowing where it shouldn’t. This focus on insulation integrity is why the test is used, rather than measuring how easily current flows through a conductor (resistance), how much capacitance exists between parts, or how hot components can get under load (thermal rating). So the test primarily checks that there’s solid isolation between parts of the circuit.