Household National Standard Distribution Box

The United States Postal Service® is proud to provide every new home and business with excellent, efficient mail delivery service. This guide will assist you in preparing your new development for mail servi. [PDF]

National Standard for Industrial Distribution Boxes

The (NEMA) defines standards used in for various grades of typically used in industrial applications. Each is rated to protect against personal access to hazardous parts, and additional type-dependent designated environmental conditions. A typical NEMA enclosure might be rated to provide protection against environmental hazards such as,, or or atmospheres containing corrosive agents such as or. [PDF]