Yes, a residential wall electrical outlet can catch fire even when nothing is plugged into it, due to underlying electrical faults within the junction box. The most common cause is a loose terminal wire connection or a failing push-in wire connector that creates high electrical resistance and continuous arcing under standard line voltage. This continuous micro-arcing generates extreme localized heat that can quickly melt plastic housings and ignite surrounding wood framing. You can troubleshoot fire risks safely by inspecting wall plates for discoloration. You can verify that your corrective action is successful when shutting off the circuit breaker, removing the faceplate, and securing loose terminal screws or replacing a damaged receptacle eliminates the source of hidden heat.
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