Why are extension cords not permitted for permanent use?

Extension cords are not permitted for permanent use primarily because they can chip, crack, or become damaged over time. They are designed for temporary use and do not have the same durability or protective features as a fixed electrical installation. Over time, regular wear and tear, exposure to environmental factors, or excessive bending can result in the insulation wearing down or the wires becoming exposed. This increases the risk of electrical hazards such as shocks, shorts, or even fire.

In contrast, permanent wiring is meant to be installed safely and securely, often within walls or conduits, with appropriate protection against physical damage, moisture, and other risks. This ensures that the electrical system is reliable and safe for long-term use, addressing both functionality and safety standards.