Yes, reverse polarity matters immensely for electrical safety, equipment longevity, and compliance with national electrical codes. Even though many lamps, chargers, and appliances will still function normally when plugged into a reverse-polarity outlet, the internal circuitry remains energized even when switched off. This drastically increases the risk of accidental electrocution during routine bulb changes or repairs, interferes with proper ground fault circuit interrupter (GFCI) protection, and can permanently damage sensitive electronic devices.
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