A distribution board is a central electrical panel that divides power into multiple circuits with protective devices, while a distribution box is a smaller enclosure that organizes and protects electr...
A distribution board (also called a panelboard, breaker panel, or consumer unit) is a fixed electrical panel that receives electricity from the main supply and distributes it to multiple circuits throughout a building . It is designed to manage high electrical loads and protect circuits from overloads or short circuits using circuit breakers, fuses, and sometimes residual-current devices (RCDs) . Distribution boards are commonly used in residential, commercial, and industrial settings, and they can be classified as:
A distribution box (also called a DB box, consumer unit, or sub-distribution box) is a smaller or portable enclosure that receives power from a main source and distributes it to a limited number of circuits . Its main purpose is to organize and protect electrical connections rather than manage large-scale power distribution. Key features include:
| Feature | Distribution Board | Distribution Box |
|---|---|---|
| Function | Central hub for distributing electricity to multiple circuits | Organizes and protects connections for specific areas or temporary setups |
| Size & Capacity | Larger, handles higher loads | Smaller, limited capacity |
| Installation | Fixed, permanent | Portable or modular |
| Applications | Entire buildings, industrial facilities, commercial spaces | Specific zones, workshops, outdoor lighting, temporary setups |
| Safety Features | Circuit breakers, fuses, RCDs, RCBOs | Circuit breakers, fuses, RCDs, SPDs |
| Power Management | Manages and balances electrical load | Primarily protects and organizes wiring |
Understanding these differences ensures proper selection for safety, efficiency, and compliance in electrical installations .
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