In a three-bedroom circuit described as having issues with bedroom 2 while bedroom 3 has none, neutral coming apart in bedroom 2 switchbox is suspected. What is the most plausible fault location?

In a three-bedroom circuit described as having issues with bedroom 2 while bedroom 3 has none, neutral coming apart in bedroom 2 switchbox is suspected. What is the most plausible fault location?

• A. Bad breaker
• B. Neutral came apart in bedroom 2 switchbox
• C. Bad lamps in rooms 2 and 3
• D. GFCI tripped

Answer: (B)

An open neutral in the bedroom 2 switch box is the most plausible fault because the symptoms point to a return-path problem localized to that branch. If the neutral conductor comes apart there, bedroom 2 loses its proper return path, causing those outlets or lights to misbehave or lose power, while bedroom 3—which isn’t affected—keeps its neutral path intact. A bad breaker would typically shut off or trip the whole circuit, not just bedroom 2. A GFCI tripping would affect only the outlets protected by that device. Bad lamps in both rooms would show issues in more than one room. So the problem is most consistent with the neutral coming apart in the bedroom 2 switch box.

An open neutral in the bedroom 2 switch box is the most plausible fault because the symptoms point to a return-path problem localized to that branch. If the neutral conductor comes apart there, bedroom 2 loses its proper return path, causing those outlets or lights to misbehave or lose power, while bedroom 3—which isn’t affected—keeps its neutral path intact. A bad breaker would typically shut off or trip the whole circuit, not just bedroom 2. A GFCI tripping would affect only the outlets protected by that device. Bad lamps in both rooms would show issues in more than one room. So the problem is most consistent with the neutral coming apart in the bedroom 2 switch box.