The answer to 'electrical wiring burning smell' is that it is a serious issue that requires immediate attention. A burning smell coming from electrical wiring is a sign of an electrical problem that could lead to a fire hazard if not addressed promptly. This is typically caused by loose connections, overloaded circuits, or damaged wiring that is overheating.
If you notice a burning smell or see signs of smoke or sparks, immediately turn off the power to the affected circuit and unplug any appliances or devices. Do not attempt to investigate the issue further, as this could be dangerous. Instead, call a licensed electrician right away to diagnose and repair the problem. Trying to fix the issue yourself could result in further damage or even a fire.