1. Polycarbonate (PC): Polycarbonate is the most widely used material for indoor residential distribution boxes due to its affordability, electrical insulation properties, and ease of modification for junctions, outlets, and switches. It is lightweight, corrosion-resistant, and aesthetically suitable for exposed areas inside homes, making it ideal for standard indoor applications . 2. Fiberglass: Fiberglass enclosures offer excellent electrical insulation, toughness, and resistance to chemicals. While comparable to polycarbonate in performance, fiberglass is generally more expensive, which is why polycarbonate is preferred for most residential installations . 3. Metal (Steel or Aluminum): Metal boxes, often made from galvanized steel, stainless steel, or aluminum alloys, provide superior mechanical strength, fire resistance, and thermal stability. They are heavier and more expensive than plastic options and are typically used in outdoor, industrial, or high-voltage applications where durability and tamper resistance are critical .
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