The three most popular materials used for Electrical Distribution Boxes are Thermoset Plastics such as Sheet Molding Compounds (SMC), Engineering Thermoplastics such as Polycarbonate (PC) and Acrylonitrile Styrene Acrylate (ASA) and Epoxy Coated Steel used to make Metallic Deep Drawn. The three most popular materials used for Electrical Distribution Boxes are Thermoset Plastics such as Sheet Molding Compounds (SMC), Engineering Thermoplastics such as Polycarbonate (PC) and Acrylonitrile Styrene Acrylate (ASA) and Epoxy Coated Steel used to make Metallic Deep Drawn. Here is a table that lists what a distribution box does: Sends electricity from the main supply to different circuits. Uses circuit breakers or fuses to stop too much current and keep you safe. Meets safety rules to lower the risk of. The key material requirements for distribution box are used in constructing an electrical distribution box play a crucial role in its durability, safety, and overall performance. This article is about Boxes, Enclosures, and Accessories Materials Selection & Requirements of Electrical Power System Systems as per International Codes and standards for Commercial Buildings, Plants and Refinery Projects.