Electrical Testing

Practical, step-by-step guides to testing electrical equipment and installations: insulation and hipot testing, motor diagnostics, and everyday multimeter checks. Start with the guides below, or browse every article underneath.

Hipot and Insulation Testing

• DC Hipot Test Voltage Chart
• Hipot Leakage Current Test Setting
• Hipot Test Parameters for UL 60335
• Polarization Index (PI) Test for Motor Insulation

Electric Motor Testing

• Types of Electric Motor Testing
• Electric Motor Stator Testing
• Electric Motor Core Loss Test
• Testing a 12 Volt Electric Motor
• Testing a Well Pump With a Multimeter
• Electric Motor Testing Services in the USA

Multimeters, Test Tools and Measurements

• Electrical Test Equipment Guide: Tools and Diagnostics (USA)
• How to Test a Capacitor With a Multimeter
• Earth Loop Impedance Testing
• Lux Level Testing Procedure

Which Test Do You Need?

Multimeter checks cover voltage, continuity, resistance, and capacitance, and are the first step in most troubleshooting. Insulation resistance and polarization index tests show how healthy winding and cable insulation is over time. Hipot tests apply a high voltage to confirm insulation withstands stress, which makes them common in product safety and production testing. Loop impedance and earth tests verify that protective devices will trip as designed.

Safety first: de-energize and lock out equipment before testing, discharge capacitors, and use test instruments with a suitable CAT rating. Follow your local code and the equipment manufacturer’s procedures.

All Electrical Testing Articles