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REFERENCE

Outlet tester shows hot/neutral reversed

The tester reports reversed polarity. Treat it as a wiring fault and have the receptacle evaluated rather than opening it or moving conductors yourself.

Stop and call a licensed electrician or emergency services now if there's smoke, sparks, a burning smell, heat, shock, or water near the problem. Otherwise it's safe to answer the questions below.

What this symptom means

The tester reports reversed polarity. Treat it as a wiring fault and have the receptacle evaluated rather than opening it or moving conductors yourself. This page explains the mechanism and the terminology. It does not assess your installation, rank causes for your situation, or tell you whether anything is safe to touch or continue using.

Illustrations live on dedicated diagram pages. This symptom page does not select a diagram state, because doing so would imply a diagnosis.

Take this handoff to your electrician

This is a reference note, not a diagnosis. It packages the symptom page you selected with the observations that are useful to record before a licensed electrician sees the installation.

Symptom reference: Outlet tester shows hot/neutral reversed

What this reference explains: The tester reports reversed polarity. Treat it as a wiring fault and have the receptacle evaluated rather than opening it or moving conductors yourself.

Record before the visit:

  • When it started and what changed immediately beforehand.
  • What is connected to the affected outlet, circuit, breaker, cord, tester, meter, or surge protector.
  • Whether anything was wet, hot, damaged, sparking, making an unusual noise, or smelled burnt.
  • Exactly what the device did: tripped once, trips again, will not reset, went dead, or showed a particular indicator/tester/meter reading.
  • Any model number, label, breaker rating, tester legend, meter setting, or visible marking you can read without opening an enclosure.

Safety boundary: Do not open an outlet box, panel, device enclosure, move wiring, replace a breaker, bypass protection, or test live conductors. If there is smoke, heat, sparking, a burning smell, shock, fire, or immediate danger, stop and contact emergency services or a licensed electrician as appropriate.

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What to record before you call

Write down what changed and when, what is connected to the circuit, whether anything was wet or damaged, what the device or breaker did (tripped once, trips immediately, will not reset), and any tester or meter markings you can read from outside the enclosure. That description is what a licensed electrician needs.

Where to stop. Do not open an outlet box, panel or enclosure, move or replace wiring, replace a breaker, bypass a protective device, or test live conductors. If the next step would require any of those, or if there is smoke, heat, sparking, a burning smell, or a shock, stop and contact a licensed electrician. In an emergency, contact emergency services.

source pack dated 2026-09-13 · authority hashes pending

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Related situations

Electrical Fault Check provides general diagnostic information only. It is not professional advice, not a quote, and not a substitute for a licensed electrician. Do not work on live wiring. If you see smoke, sparks, burning smell, heat, shock, water exposure, or repeated tripping, stop using the circuit and contact a licensed electrician or emergency services as appropriate.