What is required for sealing a box effectively against moisture?

To effectively seal a box against moisture, it's crucial to use properly rated sealing compounds in accordance with National Electrical Code (NEC) standards. These products are specifically designed to ensure that moisture does not enter electrical boxes, which could lead to hazardous conditions such as short circuits or corrosion of components. The use of rated sealing compounds provides assurance that the seal will withstand the environmental conditions the installation may encounter, such as exposure to rain, humidity, or other moisture-related elements.

Additionally, adhering to NEC standards guarantees compliance with safety regulations that protect both the electrical system and the individuals who may interact with it. While other methods or materials may seem practical, they do not necessarily meet the rigorous standards set forth in the NEC, which are designed to enhance safety and reliability in electrical installations.