No, you do not strictly need a licensed electrician to install a residential dimmer switch if you are comfortable with basic DIY electrical tasks, use insulated tools, and follow safety protocols. However, hiring a professional is strongly recommended if you feel uncomfortable working around live wires, dealing with ungrounded metal junction boxes, troubleshooting complex three-way multi-location traveler circuits, or installing advanced smart dimmers that require complex wiring. Verification: Turn off the main electrical breaker, verify zero voltage with a non-contact tester, and consult local building codes before starting.
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