This part of IEC 61969 gives guidelines for the design of outdoor enclosures and is applicable over a wide field of mechanical, electromechanical and electronic equipment and its installation where a modular design is used. The objective of this standard is to provide an overview of specifications for enclosures focused on requirements for outdoor applications at non-weather-protected locations. These enclosures are considered to contain any equipment and provide protection for the outdoor installed facilities against unwanted environmental impacts (see figure 1). The installed equipment may be, but is not limited to, subracks according to IEC 60917-2-2 or IEC 60297-3.