An electrical connector designed with one blade wider than the other is a safety feature found on many appliances. This design ensures the plug can only be inserted into an outlet in one orientation. The wider blade connects to the neutral wire, while the narrower blade connects to the hot wire.
This specific configuration significantly reduces the risk of electrical shock. By maintaining consistent polarity, appliances can be designed so that exposed metal parts are connected to the neutral wire, which is at or near ground potential. This safety measure is a long-standing practice implemented to protect users from hazardous voltages. This evolution in electrical safety standards reflects growing awareness and the development of technologies aimed at preventing electrical accidents.