Are there specific requirements for burial boxes in electrical installations?

The correct response highlights that burial boxes used in electrical installations must be rated specifically for underground use. This requirement is crucial because these boxes need to withstand the environmental conditions that come with being buried, such as moisture and soil pressure. A product rated for underground use is designed to provide adequate protection against corrosion, water infiltration, and other potential issues that could arise when installed below the ground.

In accordance with the National Electrical Code (NEC), using appropriately rated materials helps ensure both safety and compliance with regulations, ultimately protecting the integrity of the electrical system. The appropriate rating signifies that these boxes have passed certain testing standards that ensure their durability in underground conditions.

The other choices do not accurately reflect the NEC requirements. The specifications apply regardless of the size of the burial box or whether the installation is residential or commercial; thus, there are indeed specific requirements that must be met for all burial boxes used in electrical installations.