What is the difference between a distribution cabinet and a distribution box?

electrical power panel

There are significant differences between distribution cabinets and distribution boxes in many aspects. The following is a detailed comparison:

1. Use and occasions
   Distribution box: mostly used for terminal power distribution in home or small commercial places, such as schools, offices, hospitals and other areas. It is suitable for controlling electrical equipment and distributing electrical energy to small-load power terminals.
   Distribution cabinet: commonly used in centralized power supply occasions, such as industrial power, building power, etc. It is used as a motor control center or in areas with fewer loads and circuits, responsible for distributing electricity from the main power supply to various loads, such as motors, lighting, control systems, etc.
2. Appearance and size
   Distribution box: relatively small in size, generally adopts a box-type design, which is easy to install and carry.
   Distribution cabinet: large in size, usually in a vertical cabinet structure, similar to a refrigerator, and needs to be placed on the ground.
3. Function and configuration
   Distribution box: circuit breakers, contactors, indicator lights and other components are usually installed inside, which are used for lighting, motors and other control purposes. The structure is relatively simple, belonging to a small distribution box, responsible for the power supply of 4 to 8 small-load equipment.
   Distribution cabinet: explosion-proof electrical appliances or other types of explosion-proof electrical appliances can be installed inside, as well as protective equipment such as circuit breakers and fuses. It provides a large power load, and a distribution cabinet can have multiple distribution boxes, motors, etc. At the same time, the distribution cabinet also has multiple functions such as power distribution, safety protection, power metering, easy maintenance, and line arrangement.
4. Operation and maintenance
   Distribution box: It is generally operated by non-professionals, and the maximum current is generally not more than 250A. Due to its relatively simple structure, it is also relatively convenient to maintain.
   Distribution cabinet: Operation and maintenance usually require professionals. Due to its complex internal structure and functions, it may be difficult for non-professionals to operate and maintain correctly.
5. Other differences
   Applicable standards: Distribution boxes and distribution cabinets need to follow different national or industry standards during the design and manufacturing process. For example, distribution boxes may follow standards such as GB7251.3, while distribution cabinets may follow other relevant standards.
   Installation method: Distribution boxes are usually wall-mounted or embedded, while distribution cabinets are usually floor-mounted. This also reflects the difference in their size and weight.
   In summary, there are significant differences between distribution cabinets and distribution boxes in terms of use, appearance, function, operation and maintenance, and applicable standards. When choosing which equipment to use, it is necessary to decide based on the specific power demand and occasion.