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Run: Ground Resistance Fall-of-Potential Test Record

Record three-point fall-of-potential ground resistance tests with setup, soil conditions, readings, and pass/fail notes in one place. Use it to document IEEE...

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Inspection Details

Inspection date and time recorded critical (required)

Test location and grounding system identified critical (required)

Record facility name, building/area, grounding electrode system identifier, and test point location.

Inspector is qualified to perform electrical testing critical (required)

Confirm the tester is a competent person or otherwise authorized by site procedure.

Yes No N/A

Safety and Test Preconditions

Work area controlled and hazards identified critical (required)

Verify access control, trip hazards, traffic exposure, and any energized equipment hazards near the test route.

Yes No N/A

Appropriate PPE worn critical (required)

Select all PPE used for the task.

Note (optional)

Test area de-energized or isolated as required by procedure critical (required)

Confirm the grounding electrode system and connected equipment are isolated per site procedure before testing.

Yes No N/A

Weather and surface conditions noted

Record ambient temperature, precipitation, recent rainfall, and soil condition because they can affect readings.

Test Equipment and Setup

Ground resistance tester identified and calibrated critical (required)

Record meter make, model, serial number, and calibration due date.

Auxiliary current and potential leads inspected critical (required)

Verify leads are intact, properly connected, and long enough for the planned probe spacing.

Yes No N/A

Ground electrode isolated from parallel paths critical (required)

Confirm bonding jumpers, neutral connections, and parallel grounding paths were disconnected as required for a valid fall-of-potential test.

Yes No N/A

Probe spacing established and documented critical (required)

Enter the distance from the ground electrode to the current probe and potential probe positions.

Note (optional)

Soil Resistivity and Site Conditions

Soil resistivity measured or referenced

Enter the measured soil resistivity used to interpret the ground resistance result, if available.

Note (optional)

Soil moisture condition documented

Select the observed soil condition at the time of test.

Note (optional)

Recent site disturbances noted

Document whether excavation, backfill, paving, or utility work may have affected the grounding system or soil conditions.

Yes No N/A

Test Results and Acceptance

Fall-of-potential resistance reading recorded critical (required)

Enter the final ground resistance value obtained from the three-point fall-of-potential test.

Note (optional)

Acceptance criterion met per site or NEC 250.56 requirement critical (required)

Confirm the measured resistance meets the applicable acceptance criterion used by the facility.

Yes No N/A

Multiple readings taken to verify plateau or stable curve critical (required)

Confirm readings were taken at more than one probe position to verify a stable fall-of-potential curve.

Yes No N/A

Measurement notes and anomalies documented

Record any unstable readings, interference, nearby buried metal, or other factors affecting test validity.

Deficiencies, Corrective Actions, and Sign-Off

Deficiencies identified

Indicate whether any non-conformance, defect, or abnormal condition was observed during the inspection.

Yes No N/A

Corrective action documented for each deficiency

Describe corrective actions, retest requirements, or escalation to the AHJ or responsible electrical authority.

Inspector signature critical (required)

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