A distribution box (also called a distribution board, panelboard, or fuse box) is a central component of an electrical system that divides incoming electrical power into multiple circuits and provides protection through fuses or circuit breakers for each circuit . It can serve various purposes, including supplying power to lighting, sockets, small motors, or other electrical loads . Distribution boxes are essential for safety, allowing circuits to be disconnected in case of overloads or faults .
Distribution boxes are generally classified into two main types:
Power Distribution Box: Handles higher loads, such as machinery, large appliances, or multiple circuits in industrial or commercial settings. It often includes switchgear, measuring instruments, and protective devices .
Lighting Distribution Box: Specifically designed for lighting circuits and small loads like ordinary sockets or small motors. These boxes usually operate on single-phase power, with total currents typically under 63A and individual circuits under 15A. They are simpler to operate and often allow non-professionals to manage them safely .
| Feature | Power Distribution Box | Lighting Distribution Box |
|---|---|---|
| Main load | Heavy machinery, multiple circuits | Lighting fixtures, small sockets, minor motor loads |
| Power supply | Single-phase or three-phase | Mostly single-phase, occasionally three-phase |
| Current capacity | Higher, often above 63A | Lower, generally below 63A |
| User operation | Requires professional handling | Can be operated by non-professionals |
| Purpose | Distributes and protects high-power circuits | Distributes and protects lighting and small loads |
While a lighting distribution box is a type of distribution box, not all distribution boxes are lighting boxes. A general distribution box can serve multiple purposes, including lighting, power outlets, or machinery, depending on its design and installed circuits . Understanding the type of distribution box is important for proper installation, safety, and maintenance.
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