Distribution Box

Distribution Box Manufacturer

Distribution boxes are designed to safely distribute electrical power while protecting circuits from overloads and short circuits. They organize electrical components into a secure enclosure for easy installation, operation, and maintenance.

Technical Specifications

Technical Parameter	Standard Range & Options
Ingress Protection (IP Rating)	IP55, IP65, IP66, IP67, IP69K (IEC 60529 Compliant)
Impact Resistance (IK Rating)	IK08 (5 Joules), IK10 (20 Joules impact protection)
Rated Operational Voltage	Up to 690V AC / 1000V DC (Solar applications)
Rated Current	10A to 800A (Custom busbar configurations available)
Material Thickness	Sheet steel: 1.2mm, 1.5mm, 2.0mm; Mounting plate: 1.5mm–2.5mm galvanized steel
Standard Surface Colors	RAL 7035 (Light Grey), RAL 7032 (Pebble Grey), or custom corporate colors
Operating Temperature	-40°C to +85°C (-40°F to +185°F)

Key Features

Continuous Polyurethane Gasket Seals

Foam-in-place polyurethane gaskets provide a continuous seal around the door to help maintain enclosure protection.

Corrosion-Resistant Surface Finish

Steel enclosures are treated with degreasing, iron-phosphate pretreatment, and epoxy-polyester powder coating for improved corrosion resistance.

Thermal & Moisture Control Design

Optional ventilation louvers, breather valves, and anti-condensation heaters help reduce internal moisture caused by temperature changes.

Internal Components & Integration Options

DIN Rails & Mounting Plates: Zinc-plated 35mm DIN rails (IEC 60715) mounted on height-adjustable standoff brackets.

Copper Busbars & Neutral/Ground Blocks: Nickel-plated high-conductivity electrolytic copper busbars (E-Cu) rated up to 800A, fitted with touch-proof insulating shrouds.

Protective Component Integration: Optional pre-wiring for MCBs, MCCBs, RCCBs, Surge Protective Devices (SPD), and digital power meters from major brands (Schneider, ABB, Siemens, Chint) or client-specified equivalents.

Cable Management: Nylon/brass waterproof cable glands, rubber stepped grommets, and internal PVC wiring ducts.

Industry Applications

Industrial Automation & Manufacturing Plants

Housing motor starters, PLC controllers, and terminal blocks in factory environments exposed to oil mist and vibration.

Solar PV & Energy Storage (ESS)

Weatherproof combiner boxes and AC/DC isolation panels built for prolonged outdoor solar exposure and high DC voltages.

Commercial Real Estate & Infrastructure

Concealed and surface-mounted sub-distribution boards for office complexes, shopping centers, and residential developments.

Offshore, Marine & Coastal Facilities

Grade 316L stainless steel enclosures engineered to withstand salt-spray exposure and severe coastal weathering.

Temporary Construction Power

High-impact portable socket boxes equipped with RCD protection for temporary jobsite tools.

Customization Capabilities

Precision CNC Cutouts: Custom door cutouts for digital displays, push buttons, status indicators, and custom gland plate entry patterns.

Custom Dimensions & Structural Form Factors: Non-standard height, width, depth dimensions, or specialized dual-door enclosures.

Surface Finish & Branding: Powder coating matching exact RAL color swatches, laser-engraved nameplates, and silk-screened brand logos.

Contract Assembly & Wiring: Full wiring assembly and point-to-point continuity testing according to provided schematic diagrams.

Ordering Process

Step	Process	Description
01	Send Your Requirements	Share your drawings, specifications, or application details.
02	Quotation & DFM Review	We review your project and provide a quotation with engineering recommendations.
03	Sample Approval	Custom samples are produced for testing and approval before mass production.
04	Mass Production	Production begins under strict ISO 9001 quality management.
05	Quality Inspection	Every order undergoes dimensional, appearance, and functional inspections.
06	Packaging & Shipping	Products are securely packed and shipped worldwide by sea, air, or express.
07	After-Sales Support	We provide technical support and prompt after-sales service for every order.

Manufacturing Strength

Our ISO 9001

2015-certified production facility provides reliable volume manufacturing:

CNC Sheet Metal Processing

High-precision fiber laser cutting machines, multi-axis CNC turret punch presses, and automated hydraulic bending brakes.

Automated Gasket Foaming

Multi-axis CNC polyurethane dispensing machinery guarantees consistent gasket profile geometry and seal adhesion.

Production Throughput

Monthly production capacity of 50,000+ metal enclosures and 100,000+ plastic enclosures, with standard sample turnarounds in 3–5 business days.

Quality Control Process

01/

Ingress Protection Testing: IPX5 / IPX6 high-pressure water spray testing and IP6X dust-chamber testing verifying seal tightness.

02/

Coating Adhesion & Thickness Testing: Cross-hatch tape testing and magnetic thickness gauge verification of powder coat adhesion.

03/

IK Mechanical Impact Testing: Drop-hammer impact testing verifying structural integrity against physical forces.

04/

Electrical Continuity & Insulation Testing: High-voltage dielectric testing and earth bonding continuity checks on assembled units.

Packaging & Global Shipping

Protective Packaging

Individual PE film wrapping, reinforced corner protectors, thick corrugated inner cartons, and fumigation-free plywood pallets wrapped in stretch film.

Transit Durability

Drop-test verified packaging designed to protect painted surfaces and door hinges during ocean container freight or air shipments.

Logistics Terms

Supported shipping terms include EXW, FOB, CIF, DDP (Delivered Duty Paid), with drop-shipping options directly to contractor warehouse sites.

Certifications

Manufactured under ISO 9001 quality management, with CQC certification and other certifications available according to project requirements.

FAQ

Q: What is the main difference between IP65 and IP66 distribution boxes?

A: IP65 enclosures protect against low-pressure water jets from any direction. IP66 enclosures provide protection against high-pressure water jets and heavy seas, making them preferable for outdoor locations exposed to severe weather or direct washdowns.

Q: Can you manufacture distribution enclosures directly from our CAD or 3D drawings?

A: Yes. We accept DWG, DXF, STEP, and IGES file formats. Our engineering team conducts a Design for Manufacturability (DFM) review to confirm tolerances, hole placement, and structural integrity before prototyping.

Q: Are your enclosures compliant with North American UL 508A standards?

A: Our metal and non-metallic enclosures are designed and built to meet UL 508A and NEMA 4/4X specifications, making them suitable for panel builders and OEMs exporting to the USA and Canada.

Q: How do I choose between 304 and 316L stainless steel for an outdoor enclosure?

A: Grade 304 stainless steel offers general corrosion resistance for standard outdoor environments. Grade 316L contains added molybdenum, offering superior resistance to chlorides and salt spray, making it recommended for marine and coastal applications.

Q: Do you sell empty enclosures only, or fully assembled distribution boards?

A: We offer both options. You can order empty enclosures, customized enclosures with cutouts and backplates, or fully wired distribution assemblies fitted with circuit breakers, terminal blocks, and busbars.

Q: What is your Minimum Order Quantity (MOQ) for custom-sized enclosures?

A: Standard stock enclosures have no minimum order requirement. For custom sizes or specialized powder coating colors, our typical MOQ starts at 20 to 50 units depending on dimensions.

Q: How do you prevent internal moisture condensation in outdoor waterproof enclosures?

A: We supply pressure equalization breather valves (vent plugs) that balance internal/external air pressure while blocking water. For high-humidity locations, we can integrate internal anti-condensation heating elements.

Q: What is your typical production lead time for a bulk order?

A: Custom prototypes are ready in 3 to 7 working days. Bulk production orders generally take 15 to 20 calendar days from drawing sign-off and deposit receipt.

Q: Can we order a customized sample prior to placing a full production order?

A: Yes, we encourage sample prototyping. We provide a sample with your required CNC cutouts, color powder coating, and branding. Sample fees can be credited toward your subsequent bulk order.

Q: What warranty coverage do you provide on your distribution enclosures?

A: We provide a 3-year warranty on structural enclosure integrity, powder coating durability, and gasket seals under standard operating conditions. Integrated electrical components carry manufacturer warranties (typically 12–24 months).

As one of the most professional distribution box manufacturers and suppliers in China, we also support customized service. Please feel free to wholesale discount distribution box in stock here from our factory. Quality products and low price are available.

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