The Purpose of the Two Small Holes on a Standard Plug
The two small holes found near the ends of many electrical plug prongs serve practical engineering purposes, not just decoration.
A primary function is to secure the connection to the wall outlet. Many outlets contain spring-loaded contacts that snap into these holes, helping the plug grip more firmly.
This secure fit prevents the plug from loosening over time, which is important for maintaining stable electrical contact and preventing issues like power flickering or dangerous heat buildup.
The design also enhances everyday safety. A plug that is less likely to be partially dislodged minimizes exposure of the live metal prongs, reducing the risk of accidental contact.
While not a primary safety feature, this contributes to the overall reliability and safety of the electrical system within a home.
The holes are equally useful during manufacturing and packaging. They allow plugs to be securely held on assembly lines and facilitate the attachment of retail tags or security seals.
This small, often overlooked detail demonstrates how thoughtful design improves function, safety, and efficiency in everyday objects.
