NEMA Ratings, established by the National Electrical Manufacturers Association, classify electrical enclosures based on their ability to protect against environmental conditions. These ratings help ensure that equipment operates safely and effectively in various settings, such as industrial, commercial, or residential environments. Each NEMA Rating is designated by a number and may include letters that indicate specific features, such as resistance to dust, water, or corrosion. For example, a NEMA 4 rating signifies protection against water splashes and dust, making it suitable for outdoor use. Understanding these ratings is essential for selecting the right enclosure for specific applications.