Distribution boxes are generally not considered large equipment; they are compact units designed for residential, commercial, or small industrial power distribution, whereas larger distribution cabinets handle higher-capacity loads.

Size and Classification

Distribution boxes, also known as DB boxes or distribution panels, are typically smaller enclosures that house circuit breakers, fuses, bus bars, and other protective devices for distributing electrical power to multiple circuits . They are commonly wall-mounted or floor-standing and are used in residential, commercial, and light industrial settings . Their size is usually limited to handling 4–8 small loads, making them compact compared to larger distribution equipment . In contrast, distribution cabinets are larger enclosures that can accommodate multiple distribution boxes, motors, and other high-capacity electrical equipment. These cabinets are designed for medium to high-capacity loads, often ranging from several kilowatts to dozens of kilowatts, and are considered large equipment in industrial or commercial installations .

Applications

• Residential and small commercial: Single-phase or three-phase DB boxes mounted on walls for lighting, sockets, and small appliances .
• Industrial or large commercial: Larger DB boxes or floor-standing units may handle heavy machinery or high-capacity circuits, but even these are smaller than full distribution cabinets .
• Outdoor or specialized use: Pole-mounted or weatherproof DB boxes for street lighting or utility applications .

Key Takeaways

• Distribution boxes are not classified as large equipment; they are compact, modular, and designed for localized power distribution .
• Distribution cabinets or other high-capacity enclosures are considered large equipment due to their size, load capacity, and ability to house multiple DB boxes and additional electrical devices .
• The classification depends on capacity, physical size, and application, with DB boxes serving as the smaller, more versatile units within a larger electrical distribution system . In summary, while distribution boxes are essential for safe and organized power distribution, they are smaller and not considered large equipment, unlike distribution cabinets or industrial power enclosures.