Complete Catalog of Distribution Box Specifications and Models (2026 Latest Edition)

Release time:

2026-04-01

Author:

Source:

Abstract

As a core component of the power system, the distribution box performs critical functions such as power distribution, circuit protection, and equipment control. With the rapid advancement of industrial automation and smart home technologies, the distribution-box market in 2026 has evolved into a diversified, intelligent product portfolio. This paper systematically reviews the specifications, models, and key selection criteria for mainstream distribution boxes across four dimensions: functional classification, structural configuration, installation environment, and level of intelligence.

 

I. Classification by Functional Use

1. Power Distribution Box

Specifically designed for three-phase motors and high-power equipment, these devices offer comprehensive protection against short circuits, overloads, and earth faults. A typical example is the GGD series, which features a fixed mounting configuration with modular expandability, covering a rated current range from 100 A to 2,500 A. It is widely used in industrial production lines, construction sites, and other applications. Its key advantages are low cost and easy maintenance, making it the preferred choice for small and medium-sized projects.

XL-type low-voltage distribution cabinets are renowned for their ruggedness and durability, featuring a thickened metal enclosure with an IP54 protection rating that effectively guards against dust, moisture, and mechanical impact. They are commonly used to supply power to equipment such as machine tools and conveyor systems.

2. Lighting Distribution Box

Focusing on single-phase circuit control, the unit features built-in surge protection and a hierarchical power-disconnection module to ensure the safe operation of lighting systems. The PZ30 series terminal lighting distribution box boasts a flame-retardant plastic enclosure, supports expansion from 8 to 36 circuits, and has a rated current of 63 A, making it suitable for office buildings, commercial complexes, and other applications. Its compact design—measuring 250 × 300 × 160 mm—allows for flush mounting in walls, maximizing space efficiency.

3. Metering Distribution Box

Integrates high-precision electricity meters with data transmission modules to meet energy metering and remote management requirements. The PXT-K series metering cabinets support the connection of multi-tariff electricity meters and are equipped with an RS485 communication interface, enabling real-time upload of electricity consumption data to a cloud platform. They are widely used in smart industrial parks, photovoltaic power plants, and other applications. With an IP65 protection rating, they are well-suited for harsh outdoor environments.

4. Explosion-proof distribution box

Designed for explosive gas atmospheres, these products incorporate explosion-proof constructions such as flameproof (Ex d) and increased safety (Ex e). The GDX series flameproof distribution boxes feature a enclosure wall thickness of ≥8 mm, capable of withstanding an explosion pressure of 1 MPa, making them suitable for high-risk environments such as petrochemical facilities and coal mines. They are rated at AC 380 V, with a main circuit current range from 1 A to 250 A, and must be certified in accordance with the GB 3836 standard.

 

II. Classification by Structural Form

1. Fixed Distribution Box

With a simple structure and low cost, all components are permanently mounted on the base plate. The GGD series is a typical example, featuring standardized modular design that allows for expansion by adding functional units. Maintenance requires opening the enclosure door, making it suitable for applications with stable loads that do not require frequent modifications.

2. Drawer-type distribution box

The system employs modular drawer units, with each drawer dedicated to an independent circuit and supporting hot-swappable maintenance. The GCS series drawer-type distribution cabinets support expansion from 8 to 40 circuits, and the drawer actuation mechanism is equipped with interlocking devices to ensure operational safety. Its key advantages include rapid fault isolation and flexible scalability, making it the preferred choice for high-reliability facilities such as data centers and hospitals.

3. Prefabricated Distribution Box

Factory-prefabricated and fully integrated with components such as circuit breakers and surge protectors, the JXF series pre-assembled distribution cabinets offer “plug-and-play” convenience. Featuring a cold-rolled steel enclosure, they support both surface-mounted and flush-mounted installation, reducing installation time by 50% compared with conventional distribution cabinets—making them ideal for fast-delivery commercial projects.

 

III. Classification by Installation Environment

1. Indoor distribution box

The protection rating is typically IP30, making it suitable for dry, dust-free environments. The PZ20 series terminal distribution boxes feature an ABS plastic enclosure only 8 mm thick, which can be flush-mounted in standard 86-type junction boxes, and are widely used in residential distribution rooms. Internally, the design is compact, supporting expansion from 4 to 12 circuits with a rated current of 63 A.

2. Outdoor Distribution Box

The enclosure must meet an IP65 or higher protection rating to withstand rain, wind, and sand/dust erosion. Time Electric’s outdoor distribution cabinets feature a 304-grade stainless steel enclosure, a sloped rainproof cap on the top, and sealed cable entry ports at the base, ensuring stable operation across a temperature range of –40°C to 70°C. Inside, a built-in temperature sensor automatically activates the cooling fan when the ambient temperature exceeds 45°C.

3. Distribution Boxes for Special Environments

Designed to withstand extreme conditions such as corrosive gases and high temperatures. For example, distribution cabinets dedicated to the chemical industry feature an epoxy resin coating and 316L stainless steel screws, with an IP66 protection rating; underground coal mine distribution cabinets, on the other hand, must obtain MA certification and provide triple protection—explosion-proof, waterproof, and dustproof.

 

IV. Classification by Level of Intelligence

1. Traditional distribution box

Primarily relying on mechanical protection devices, it meets basic power distribution needs. Its advantages include low cost and high reliability; however, it lacks remote monitoring and data analytics capabilities, leading to its gradual replacement by smart distribution cabinets.

2. Smart Distribution Box

Equipped with an IoT module, it supports remote monitoring, energy consumption analysis, fault prediction, and other functions. For example, the Schneider Electric TLA18B smart distribution cabinet, featuring A9-series circuit breakers, can monitor parameters such as current, voltage, and power factor in real time and upload the data to a cloud platform via Wi-Fi or 4G. Its AI algorithms can predict equipment lifespan and issue maintenance alerts up to 30 days in advance, helping enterprises build a digital energy management system.

 

V. Key Considerations for Selection

1. Parameter Matching

Calculate the rated current based on the total load power, with a 20% margin reserved. For example, for a household with a total power of 10 kW, a distribution box with a rated current of 63 A should be selected; for industrial equipment with a total power of 100 kW, a model rated at 250 A or higher is required.

2. Protection Level

Select IP30 for dry indoor environments, IP54 for humid environments, and IP65 for outdoor environments. If the device is installed in a corrosive environment, choose a model with a stainless steel enclosure or a corrosion-resistant coating.

Key words:

Previous:

Installation and Commissioning Procedures for Complete Switchgear Cabinets

Next:

Detailed Technical Specifications of Complete Switchgear Cabinets

Recommended Reading

Chengyuan Electric and Siemens join forces to create a better future!

On October 23, 2024, at 2:00 PM, Chengyuan Electric successfully held a project communication and technical sharing meeting with Siemens in the first-floor exhibition hall of the factory. The purpose of this meeting was to strengthen cooperation and communication between both parties, promote innovation, and jointly advance the development of the smart electrical field.

2024-10-29

How to choose suitable box-type substations and cable branch boxes

In the power system, box substations and cable branch boxes play a crucial role and are widely used in various settings, such as industrial parks, residential areas, and commercial buildings. However, faced with a variety of models and specifications available in the market, how can one choose the box substation and cable branch box that best meet their needs?

2023-12-25

The role of cable junction boxes in automated control systems.

The cable branching box is one of the indispensable components in an automation control system, playing an important role in the system by enabling the branching and connection of cables, ensuring the normal operation of the entire system. This article introduces the function of the cable branching box and its significance in automation control systems.

2023-12-15

%E7%AC%AC%E4%B8%80%EF%BC%8C%E6%9C%80%EF%BC%8C%E4%BC%98%E7%A7%80%EF%BC%8C%E5%A2%9E%E5%BC%BA%EF%BC%8C%E4%B8%80%E6%B5%81%EF%BC%8C%E5%8D%93%E8%B6%8A%EF%BC%8C%E9%A2%86%E5%85%88%EF%BC%8C%E5%85%88%E8%BF%9B%EF%BC%8C%E5%BC%95%E9%A2%86

Sorry，当前栏目暂无内容!

您可以查看其他栏目或返回 首页

Sorry，The current column has no content!

You can view other columns or return Home