Which of the following is a symptom of a potential electrical issue when testing a wire?

A wire getting too hot is indeed a significant symptom of a potential electrical issue. When a wire overheats, it can indicate that there is excessive current flowing through it, which may be caused by a short circuit, overload, or poor connections. This excessive heat can lead to insulation breakdown, increasing the risk of short circuits or even fire hazards. Therefore, monitoring wire temperature is crucial in diagnosing electrical issues.

In contrast, a wire that feels cold could imply a lack of current flow, which may not indicate an issue but rather normal operation in some contexts. A buzzing sound is typically associated with components like relays or transformers under load, not directly a symptom of a wire issue. Intact insulation generally suggests no current leakage and is not indicative of problems in the same way that overheating is. Understanding these distinctions helps in diagnosing electrical problems effectively.