A GFCI protection device trips repeatedly when a power tool is plugged in. The tool appears to work normally on other circuits. What is the most appropriate action?
Correct Answer
A) Remove the tool from service for inspection
A tool that repeatedly trips a GFCI likely has a ground fault and poses an electrocution hazard. The tool must be removed from service and inspected by a qualified person before further use.
Why This Is the Correct Answer
A GFCI detects ground faults as small as 4–6 milliamps and trips to prevent electrocution. If a specific tool consistently trips a GFCI but works on non-GFCI circuits, it means the tool has an internal ground fault that non-GFCI circuits cannot detect — making it even more dangerous there. Per OSHA 29 CFR 1926.404, defective equipment must be removed from service and inspected by a qualified person before reuse.
Why the Other Options Are Wrong
Option B: Replace the GFCI device
Replacing the GFCI device assumes the device is faulty, but the scenario specifies the tool trips the GFCI consistently while working normally on other circuits — this pattern confirms the fault is in the tool, not the GFCI. A new GFCI would trip for the same reason.
Option C: Use the tool on a non-GFCI circuit
Using the tool on a non-GFCI circuit is the most dangerous option. The ground fault still exists; non-GFCI circuits simply lack the detection mechanism, meaning any fault current could flow through a worker's body without tripping a breaker in time to prevent serious injury or death.
Option D: Reset the GFCI and continue working
Resetting the GFCI and continuing ignores the root cause. Repeated tripping is not a nuisance — it is the GFCI doing exactly what it is designed to do. Continuing to use the tool exposes workers to electrocution risk and violates OSHA electrical safety standards.
Memory Technique
Think of the GFCI as a smoke alarm: if the alarm goes off every time you cook on one stove, you don't replace the alarm — you get the stove inspected. The alarm is doing its job.
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