No, you do not strictly need a licensed electrician to install a dimmer switch if you are comfortable with basic home DIY electrical tasks, possess insulated tools, and strictly follow safety precautions. However, hiring a professional is strongly recommended if you are uncomfortable working around live wires, dealing with ungrounded metal boxes, troubleshooting complex three-way traveler switch configurations, or installing smart dimmers in homes lacking a neutral wire. Verification: Turn off the main breaker, verify zero voltage with a non-contact tester, and consult local building codes before attempting DIY installation.
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