26
Measuring Leakage Current
Clamp all three of the circuit's wires in a bundle
1
2
2
lg
Load
equipment
Ground wire
3-phase 3-wire circuit
Ground wire
1
• To measure a single-phase 2-wire circuit, clamp both of the
circuit's wires together.
• To measure a 3-phase 3-wire circuit, clamp all 3 of the
circuit's wires bundled together.
• To measure a 3-phase 4-wire circuit, clamp all 4 of the circuit's
wires bundled together. If that is not possible, carry out the
measurement on the equipment's ground wire.
The effective value (RMS) of the leak current
will be shown on the digital display.