What materials are burial boxes specifically rated to handle?

Burial boxes, often used for electrical equipment and connections underground, are specifically designed to withstand underground moisture and pressure. This is critical because these boxes are installed below the surface where they can be exposed to a high level of moisture from the surrounding soil and groundwater. Moreover, they need to tolerate the weight of soil above them and any traffic that may occur on the ground surface, which creates pressure on the box.

The materials used in burial boxes are selected for their durability against deterioration due to moisture, ensuring that electrical connections remain safe and functional over time. This robust construction helps prevent failures caused by environmental factors, which is why moisture and pressure handling is an essential aspect of their design.