What is required for the installation of outdoor electrical boxes?

The requirement for weatherproofing outdoor electrical boxes is based on the need to protect the electrical connections and components from moisture, dust, and other environmental factors. Outdoor installations are exposed to elements that can lead to deterioration or failure if proper precautions are not taken. Weatherproofing ensures that the electrical box can withstand precipitation and prevents water from entering the enclosure, which could cause short circuits or other hazardous situations.

The National Electrical Code specifies that outdoor boxes must have adequate weatherproofing to maintain safe electrical practices and ensure the longevity of the installation. This includes using appropriate materials, seals, and gaskets designed for outdoor use, ensuring that the installation remains safe and compliant with regulations.

The other options may not align with NEC requirements or are not pertinent to the necessity of protecting electrical components in outdoor settings. For example, mounting on a pedestal or specific height restrictions are not universal requirements for all types of outdoor installations, and size can indeed be an important factor in terms of capacity and proper installation practices. However, the overarching principle governing outdoor electrical boxes is their need for effective weatherproofing to reduce risks associated with external conditions.