An outdoor extension cord is a useful electrical accessory which is specifically designed for use outside. However, most of them can be used indoors as well. Essentially, it allows you to power tools and accessories away from the main power source. This gives you more freedom to use your devices outdoor in hard-to-reach areas. The cords come in different lengths and power ratings depending on your needs. The right cord will help to ensure an optimum performance level, enhance safety, and maximize power efficiency. Since outdoor extension cords are exposed to the weather, the insulation and jacket need to be made of more durable materials. They are designed to withstand chemicals, moisture, and temperature changes.