Product Introduction
Introduction to Distribution Box Enclosures
I. Enclosure Materials
1. Cold-Rolled Steel Plate Enclosures
Material Characteristics: Adopts SPCC cold-rolled steel plates with a thickness of 1.2-2.0mm
Surface Treatment:
Phosphating treatment to enhance rust resistance
Electrostatic spraying (usually RAL7035 light gray)
Coating thickness: 60-80μm
Advantages: High mechanical strength, low cost, good fire resistance
Disadvantages: Relatively heavy weight, average corrosion resistance
2. Stainless Steel Enclosures
Material Grades: SUS304 or SUS316L
Thickness Range: 1.0-1.5mm
Surface Treatment:
Brushing treatment (commonly used)
Polished mirror treatment (for special requirements)
Passivation treatment to enhance corrosion resistance
Advantages: Strong corrosion resistance, long service life, aesthetic appearance
Disadvantages: High cost, high processing difficulty
3. Engineering Plastic Enclosures
Material Types:
Polycarbonate (PC): High impact resistance
Glass fiber-reinforced polyester: High mechanical strength
ABS engineering plastic: Good comprehensive performance
Advantages: Light weight, good insulation, corrosion resistance
Disadvantages: Poor aging resistance, low fire rating
4. Aluminum Alloy Enclosures
Material Models: 6063 or 5052 aluminum alloy
Processing Technology: Die-casting molding or sheet metal processing
Surface Treatment: Anodization (multiple color options available)
Advantages: Light weight, high strength, good heat dissipation
Disadvantages: High cost, limited protection level
II. Detailed Explanation of Protection Level
IP Protection Level System
IP □ □
│ │ │
│ │ └─ Second characteristic digit (water protection level)
│ └─ First characteristic digit (dust protection level)
└─ International Protection Mark
III. Application Site Guide
Civil Buildings
Residential Power Distribution: IP41 rating, cold-rolled steel plates or engineering plastics
Commercial Premises: IP54 rating, aesthetic stainless steel enclosures
Public Facilities: IP65 rating, corrosion-resistant materials
Industrial Environments
General Workshops: IP54 rating, cold-rolled steel plates
Corrosive Environments: IP65 rating, stainless steel or plastics
Explosion-Proof Areas: IP65 rating, special explosion-proof design
Outdoor Installation
Open-Air Locations: IP65/IP67 rating, stainless steel or engineering plastics
IV. Detailed Explanation of Protection Level
I. Enclosure Materials
1. Cold-Rolled Steel Plate Enclosures
Material Characteristics: Adopts SPCC cold-rolled steel plates with a thickness of 1.2-2.0mm
Surface Treatment:
Phosphating treatment to enhance rust resistance
Electrostatic spraying (usually RAL7035 light gray)
Coating thickness: 60-80μm
Advantages: High mechanical strength, low cost, good fire resistance
Disadvantages: Relatively heavy weight, average corrosion resistance
2. Stainless Steel Enclosures
Material Grades: SUS304 or SUS316L
Thickness Range: 1.0-1.5mm
Surface Treatment:
Brushing treatment (commonly used)
Polished mirror treatment (for special requirements)
Passivation treatment to enhance corrosion resistance
Advantages: Strong corrosion resistance, long service life, aesthetic appearance
Disadvantages: High cost, high processing difficulty
3. Engineering Plastic Enclosures
Material Types:
Polycarbonate (PC): High impact resistance
Glass fiber-reinforced polyester: High mechanical strength
ABS engineering plastic: Good comprehensive performance
Advantages: Light weight, good insulation, corrosion resistance
Disadvantages: Poor aging resistance, low fire rating
4. Aluminum Alloy Enclosures
Material Models: 6063 or 5052 aluminum alloy
Processing Technology: Die-casting molding or sheet metal processing
Surface Treatment: Anodization (multiple color options available)
Advantages: Light weight, high strength, good heat dissipation
Disadvantages: High cost, limited protection level
II. Detailed Explanation of Protection Level
IP Protection Level System
IP □ □
│ │ │
│ │ └─ Second characteristic digit (water protection level)
│ └─ First characteristic digit (dust protection level)
└─ International Protection Mark
| Protection Level | Dust Protection Capability | Water Protection Capability | Typical Application Sites |
| IP20 | Prevents finger contact | No water protection | Dry indoor environments |
| IP41 | Prevents tool intrusion | Protection against dripping water | General industrial environments |
| IP54 | Dust-proof | Protection against splashing water | Dusty and humid environments |
| IP65 | Dust-tight | Protection against spraying water | Outdoor areas, washing areas |
Civil Buildings
Residential Power Distribution: IP41 rating, cold-rolled steel plates or engineering plastics
Commercial Premises: IP54 rating, aesthetic stainless steel enclosures
Public Facilities: IP65 rating, corrosion-resistant materials
Industrial Environments
General Workshops: IP54 rating, cold-rolled steel plates
Corrosive Environments: IP65 rating, stainless steel or plastics
Explosion-Proof Areas: IP65 rating, special explosion-proof design
Outdoor Installation
Open-Air Locations: IP65/IP67 rating, stainless steel or engineering plastics
IV. Detailed Explanation of Protection Level
| Environmental Conditions | Recommended Materials | Protection Level | Special Requirements |
| Dry Indoor Areas | Cold-Rolled Steel Plates | IP41 | Basic Protection |
| Humid Environments | Stainless Steel | IP54 | Enhanced Sealing |
| Corrosive Environments | 316 Stainless Steel | IP65 | Anti-Corrosion Treatment |
| Outdoor Open-Air Areas | Engineering Plastics | IP65 | UV Protection |
| Explosion-Proof Areas | Cast Aluminum or Stainless Steel | IP65 | Explosion-Proof Certification |
V. Electrical Performance Considerations
Grounding Continuity: Enclosure grounding design, resistance ≤ 0.1Ω
Insulation Performance: Insulation resistance ≥ 10MΩ
Withstand Voltage Performance: No breakdown at AC 2500V for 1 minute
Thermal Performance: Temperature rise ≤ 40K (under rated current)
VI. Structural Design Requirements
Installation Methods: Wall-mounted, floor-mounted, embedded
Wire Inlet/Outlet Design: Bottom inlet, top inlet, front/rear inlet
Heat Dissipation Design: Natural cooling, fan cooling, heat sinks
Expandability: Modular design, expansion space
VII. Installation and Maintenance
Installation Specifications
Installation Height: 1.3-1.5m from the ground to the bottom of the box (for easy operation)
Ventilation Requirement: ≥ 100mm clearance around the box (for heat dissipation needs)
Grounding Requirement: Dedicated grounding terminal for reliable connection
Sealing Treatment: Sealing of wire inlet/outlet holes to meet the protection level
VIII. Maintenance Key Points
Regular Inspection: Check the aging condition of sealing strips
Cleaning and Maintenance: Use appropriate cleaning agents
Corrosion Treatment: Timely treatment of surface damages
Upgrade and Transformation: Consider future expansion needs
IX. Summary and Recommendations
Prioritize environmental adaptability when selecting materials.
Choose a higher protection level rather than a lower one, and reserve a safety margin.
Consider future demand changes for expandability.
Ensure certification requirements comply with local standards and specifications.
Optimize cost control on the premise of meeting technical requirements.
Grounding Continuity: Enclosure grounding design, resistance ≤ 0.1Ω
Insulation Performance: Insulation resistance ≥ 10MΩ
Withstand Voltage Performance: No breakdown at AC 2500V for 1 minute
Thermal Performance: Temperature rise ≤ 40K (under rated current)
VI. Structural Design Requirements
Installation Methods: Wall-mounted, floor-mounted, embedded
Wire Inlet/Outlet Design: Bottom inlet, top inlet, front/rear inlet
Heat Dissipation Design: Natural cooling, fan cooling, heat sinks
Expandability: Modular design, expansion space
VII. Installation and Maintenance
Installation Specifications
Installation Height: 1.3-1.5m from the ground to the bottom of the box (for easy operation)
Ventilation Requirement: ≥ 100mm clearance around the box (for heat dissipation needs)
Grounding Requirement: Dedicated grounding terminal for reliable connection
Sealing Treatment: Sealing of wire inlet/outlet holes to meet the protection level
VIII. Maintenance Key Points
Regular Inspection: Check the aging condition of sealing strips
Cleaning and Maintenance: Use appropriate cleaning agents
Corrosion Treatment: Timely treatment of surface damages
Upgrade and Transformation: Consider future expansion needs
IX. Summary and Recommendations
Prioritize environmental adaptability when selecting materials.
Choose a higher protection level rather than a lower one, and reserve a safety margin.
Consider future demand changes for expandability.
Ensure certification requirements comply with local standards and specifications.
Optimize cost control on the premise of meeting technical requirements.
The correct selection of distribution box enclosures is not only related to the normal operation of equipment, but also directly affects the safety and reliability of the system. It is recommended to fully consider the actual operating environment, future expansion needs and maintenance convenience when selecting, and choose the most suitable product configuration.
X. Reference Drawings Are for Reference Only
X. Reference Drawings Are for Reference Only