Industrial enclosures are used to house electronic components, equipment and devices. They are designed to protect personnel from accidental injury and to prevent the ingress of environmental contaminants such as dust and water. There are many types of industrial enclosures. Examples include electronic and instrument enclosures, operator interface enclosures, console enclosures, consolet enclosures, pushbutton enclosures, personal computer (PC) enclosures, National Electrical Manufacturers Association (NEMA) and Ingress Protection (IP) enclosures, rack enclosures, modular enclosures, and terminal and junction boxes. Industrial enclosures are rectangular or T-shaped and may include a sloped or slanted surface. They are made from a variety of materials and available in many different sizes, sealing configurations, and mounting styles. Length, width, and height are important dimensions. Inside length, inside width, and inside height are also important considerations. Because some industrial enclosures can be mounted in several different ways, suppliers recommend viewing product pictures or diagrams to determine which dimensions refer to length and which dimensions refer to width.