Compact Multi-Circuit Distribution Box Enclosure

Shangming is a professional manufacturer of compact multi-circuit distribution box enclosures, offering factory-direct sales and providing customized solutions and comprehensive after-sales service. This product is suitable for environments with limited installation space, featuring a compact size and high-density internal circuit layout, enabling safe multi-circuit power distribution in confined areas and eliminating the need for multiple external single-circuit boxes.

Core Advantages

If you desire miniaturized, modular, and intelligent power distribution for your project, compact multi-circuit distribution boxes are more suitable than traditional single-circuit boxes or large distribution cabinets.

1. Space Saving

Compact distribution boxes feature a thin design, with a standard depth of only 70–100mm, easily embedding into lightweight partitions, furniture back panels, equipment housings, or narrow electrical shafts, occupying minimal space.

Within confined spaces, the high circuit density, integrating 8–24 miniature circuit breakers, saves over 60% of installation space compared to distributing multiple single-circuit boxes.

If needed, we can customize configurations supporting parallel expansion, allowing for horizontal combinations to form larger capacity distribution units.

2. Safety

Shangming's distribution box enclosures are made of high-quality metal, with options for galvanized steel or 304 stainless steel, effectively suppressing the spread of fire.

Each circuit is equipped with independent overload and short-circuit protection, ensuring precise fault isolation.

Wide IP Protection Rating Coverage:

Indoor Use: IP20–IP40, protects against finger contact and solid foreign objects.

Outdoor or Humid Environment Use: IP54 metal housing, dustproof and splashproof, suitable for bathrooms, balconies, outdoor equipment boxes, etc.

3. Easy Installation and Maintenance

The Compact Multi-Circuit Distribution Box Enclosure comes pre-installed with standardized DIN rails. We use mainstream brand circuit breakers (Schneider Electric, ABB, etc.) for direct mounting, eliminating the need for drilling or screws.

Φ20/25mm knockout holes are provided on the top, bottom, and back for multi-directional cable entry and exit, accommodating different wiring paths.

The door uses a snap-on or hinged design, allowing for one-handed opening. Circuit labeling areas are provided on the inside of the door or panel, supporting printed or handwritten annotations.

4. Full Customization Available

Materials Available: Iron, galvanized sheet, 201 stainless steel, 304 stainless steel.

Non-standard Size Support: We offer full customization of width, height, and depth to match special equipment openings or building wall thicknesses.

Functional modules: Can be pre-installed with surge protectors, smart meters, remote control modules, USB sockets, etc.

Appearance customization: Supports RAL color spraying, brushed stainless steel finish, and logo silkscreen printing, integrating into high-end interior design styles.

How to Determine the Required Number of Circuits?

You may encounter this question during the selection process. Shangming provides a three-step method for initial assessment.

1. Split Circuits by Functional Area

This is the most basic statistical method. A standard modern configuration typically recommends separating high-power devices from general electrical circuits:

● Lighting Circuits: At least 1-2 circuits are recommended, controlled by area to avoid a short circuit in one area causing darkness throughout the house.

● General Outlets: Allocate according to the number of rooms, typically one circuit for every 3-5 rooms.

● Dedicated High-Power Circuits: This is crucial. Air conditioners, water heaters, ovens, dishwashers, dryers, etc., with a power rating ≥1.5kW, must each occupy an independent circuit.

● Kitchen and Bathroom: Due to the humid environment and concentrated appliances, it is recommended to install a separate residual current circuit (RCD).

2. Calculate Module Width

We use "Way" or "Module" to measure capacity.

1 Module = 18mm (i.e., the width of a single-pole circuit breaker MCB).

RCCB/RCBO: Typically occupies 2 modules, i.e., 36mm.

Main Switch: Typically occupies 2-4 modules.

Calculation Formula: Total Required Modules = (Number of Single-Pole Switches x 1) + (Number of Double-Pole/Residual Current Circuit Breakers x 2) + (Main Switch x 2/4)

3. 20% Reservation Principle

Never fill the distribution box completely; leaving room for future expansion is an industry standard. So, why leave room?

Future Expansion: When adding surveillance, smart home systems, or new appliances in the future, you won't need to replace the entire box.

Heat Dissipation Space: In a compact multi-circuit box, reserved space helps air convection, reducing the risk of circuit breakers tripping due to overheating.

Recommendation: If you calculate that you need 10 circuits, choose a 12-circuit box; if you calculate that you need 18 circuits, choose a 24-circuit box.

Typical Scenario Reference Table

Shangming Electric supports your precise model selection. We offer:

Free circuit layout consultation: Send us your equipment list, and we'll recommend suitable enclosure models.

Multiple modular combinations: Standard sizes include 12, 18, 24, and 36 modules; non-standard customization is also supported.

Pre-installed DIN rail + circuit breaker option: Pre-assembled according to your circuit plan, ready to use upon arrival.