Indoor Electrical Enclosure with Window | Cold Rolled Steel Junction Box

Indoor Electrical Enclosure with Window | Cold Rolled Steel Junction Box

The indoor electrical enclosure with transparent viewing window is a heavy-duty wall-mounted electrical junction box fabricated from thickened cold-rolled steel plate. Engineered for indoor low-voltage electrical applications, it features a clear shatterproof window for visual inspection without opening the door, along with reliable dustproof and rustproof performance. Available in both horizontal and vertical configurations with full custom fabrication support, it is an ideal solution for industrial control panels, power distribution systems and electrical monitoring installations.

The indoor electrical enclosure with transparent viewing window is a heavy-duty wall-mounted electrical junction box fabricated from thickened cold-rolled steel plate. Engineered for indoor low-voltage electrical applications, it features a clear shatterproof window for visual inspection without opening the door, along with reliable dustproof and rustproof performance. Available in both horizontal and vertical configurations with full custom fabrication support, it is an ideal solution for industrial control panels, power distribution systems and electrical monitoring installations.

Product Overview

The windowed indoor electrical enclosure is a professional-grade metal junction box designed for indoor low-voltage power distribution and industrial control systems. Constructed from high-quality thickened cold-rolled steel with a durable powder-coated finish, it delivers excellent structural strength, corrosion resistance and long service life for continuous indoor operation.
Equipped with a high-definition transparent viewing window, this enclosure allows operators to visually monitor internal component status without opening the cabinet door, improving inspection efficiency and operational safety. It is available in both horizontal and vertical mounting styles, with a wide range of standard sizes and full custom engineering capabilities to accommodate diverse project specifications. Widely deployed in factory workshops, commercial buildings and automation facilities, it provides reliable, space-saving housing for circuit breakers, contactors, meters and control components.

Key Features

  • Thickened Cold-Rolled Steel Housing: Reinforced steel plate construction with high mechanical strength, resistant to impact and deformation
  • Clear Transparent Viewing Window: Shatterproof window enables real-time visual inspection of internal devices without door opening
  • Dustproof & Rustproof Design: Sealed door frame with rubber gasket and electrostatic powder coating prevents dust ingress and surface rust
  • Flexible Mounting Options: Available in both horizontal and vertical configurations to fit different installation spaces
  • Secure Built-in Lock: Standard cylinder lock with key prevents unauthorized access and ensures electrical safety
  • Pre-configured Internal Mounting: Pre-drilled mounting holes and optional DIN rail for quick component installation
  • Wall Mount Structure: Compact wall-mounted design saves floor space, suitable for various indoor installation scenarios
  • Full Customization Support: Custom dimensions, cable openings, internal layout and branding available for non-standard requirements

Technical Specifications

ParameterSpecification
Enclosure MaterialHigh-grade cold-rolled steel (CRS) plate
Surface TreatmentElectrostatic powder coating
Protection DegreeIP54 (indoor dustproof & splash-proof)
Installation MethodWall-mounted
Standard Plate Thickness1.2mm / 1.5mm (customizable)
Window MaterialHigh-strength transparent PC panel
Lock TypeCylinder lock with keys
Configuration TypesHorizontal type / Vertical type
Rated VoltageAC 220V / 380V, 50/60Hz
Applicable StandardIEC 60439-1
CustomizationFull custom size & internal structure supported

Standard Configuration Options

Mounting Styles

  • Vertical enclosure (tall design, for side-by-side component layout)
  • Horizontal enclosure (wide design, for multi-row component layout)

Common Standard Sizes (W × H × D, mm)

  • 300 × 400 × 200
  • 400 × 500 × 200
  • 500 × 600 × 250
  • 600 × 800 × 300
  • 800 × 1000 × 300

    Custom dimensions are available upon request.

Application Scenarios

  • Industrial automation control panels and PLC control systems
  • Indoor low-voltage power distribution for factories and commercial buildings
  • Electrical monitoring and metering cabinets
  • Security and fire alarm system control boxes
  • Building automation and intelligent control enclosures
  • Workshop equipment electrical control boxes
  • Communication and network equipment indoor housings

Structural & Craft Advantages

  1. Premium Material & Finishing

    The enclosure body is stamped and formed from thickened high-quality cold-rolled steel plate, with high rigidity and strong load-bearing capacity. The surface is treated with electrostatic epoxy powder coating, which has strong adhesion, uniform color, excellent rust resistance and long-lasting appearance.

  2. High-performance Sealing Design

    The door frame is fitted with a continuous sealing rubber strip, which effectively blocks dust and fine particles from entering the cabinet, ensuring stable operation of internal electrical components. The IP54 protection grade fully meets the protection requirements of general indoor industrial and commercial environments.

  3. High-definition Observation Window

    The window is made of high-strength transparent polycarbonate (PC) material, which is impact-resistant, scratch-resistant and has high light transmittance. The window frame is tightly sealed with the door panel to ensure the overall dustproof and sealing performance of the cabinet.

  4. Precision Manufacturing Process

    Adopting CNC precision shearing and bending technology, the enclosure has accurate dimensions, flat structure and tight assembly gaps. The edges are smoothly treated without burrs, which protects cables and operators from scratches during installation and maintenance.

Customization Service

As a professional enclosure manufacturer, we provide comprehensive one-stop customization solutions:
  • Custom enclosure dimensions, plate thickness and structural design
  • Custom positions and sizes of cable inlet and outlet holes, with matching cable glands
  • Internal configuration assembly: DIN rails, terminal blocks, mounting plates, back panels, etc.
  • Custom color of powder coating and brand logo printing
  • Special lock types, window sizes and additional functional accessories
  • Full non-standard design and production according to customer drawings

Quality Assurance

  • Manufactured under strict ISO 9001 quality management system
  • 100% dimensional inspection, sealing test and appearance inspection before delivery
  • Standard export packaging to ensure product safety during long-distance transportation
  • Damage compensation guarantee: any product damaged during shipping will be replaced free of charge
  • Direct factory supply with competitive bulk pricing and reliable lead time

Installation & Maintenance Tips

  1. Select a flat indoor wall surface for installation, ensure the enclosure is mounted horizontally and vertically to avoid door misalignment.
  2. Before installing internal components, confirm that the enclosure is reliably grounded to ensure electrical safety.
  3. Keep the transparent window clean regularly to maintain good visibility; wipe with a soft cloth to avoid scratches.
  4. Periodically check the sealing strip and lock mechanism to ensure long-term dustproof performance and reliable locking.
  5. Do not modify the enclosure structure or drill holes without authorization, so as not to affect the structural strength and protection performance.

Product Overview

The windowed indoor electrical enclosure is a professional-grade metal junction box designed for indoor low-voltage power distribution and industrial control systems. Constructed from high-quality thickened cold-rolled steel with a durable powder-coated finish, it delivers excellent structural strength, corrosion resistance and long service life for continuous indoor operation.
Equipped with a high-definition transparent viewing window, this enclosure allows operators to visually monitor internal component status without opening the cabinet door, improving inspection efficiency and operational safety. It is available in both horizontal and vertical mounting styles, with a wide range of standard sizes and full custom engineering capabilities to accommodate diverse project specifications. Widely deployed in factory workshops, commercial buildings and automation facilities, it provides reliable, space-saving housing for circuit breakers, contactors, meters and control components.

Key Features

  • Thickened Cold-Rolled Steel Housing: Reinforced steel plate construction with high mechanical strength, resistant to impact and deformation
  • Clear Transparent Viewing Window: Shatterproof window enables real-time visual inspection of internal devices without door opening
  • Dustproof & Rustproof Design: Sealed door frame with rubber gasket and electrostatic powder coating prevents dust ingress and surface rust
  • Flexible Mounting Options: Available in both horizontal and vertical configurations to fit different installation spaces
  • Secure Built-in Lock: Standard cylinder lock with key prevents unauthorized access and ensures electrical safety
  • Pre-configured Internal Mounting: Pre-drilled mounting holes and optional DIN rail for quick component installation
  • Wall Mount Structure: Compact wall-mounted design saves floor space, suitable for various indoor installation scenarios
  • Full Customization Support: Custom dimensions, cable openings, internal layout and branding available for non-standard requirements

Technical Specifications

ParameterSpecification
Enclosure MaterialHigh-grade cold-rolled steel (CRS) plate
Surface TreatmentElectrostatic powder coating
Protection DegreeIP54 (indoor dustproof & splash-proof)
Installation MethodWall-mounted
Standard Plate Thickness1.2mm / 1.5mm (customizable)
Window MaterialHigh-strength transparent PC panel
Lock TypeCylinder lock with keys
Configuration TypesHorizontal type / Vertical type
Rated VoltageAC 220V / 380V, 50/60Hz
Applicable StandardIEC 60439-1
CustomizationFull custom size & internal structure supported

Standard Configuration Options

Mounting Styles

  • Vertical enclosure (tall design, for side-by-side component layout)
  • Horizontal enclosure (wide design, for multi-row component layout)

Common Standard Sizes (W × H × D, mm)

  • 300 × 400 × 200
  • 400 × 500 × 200
  • 500 × 600 × 250
  • 600 × 800 × 300
  • 800 × 1000 × 300

    Custom dimensions are available upon request.

Application Scenarios

  • Industrial automation control panels and PLC control systems
  • Indoor low-voltage power distribution for factories and commercial buildings
  • Electrical monitoring and metering cabinets
  • Security and fire alarm system control boxes
  • Building automation and intelligent control enclosures
  • Workshop equipment electrical control boxes
  • Communication and network equipment indoor housings

Structural & Craft Advantages

  1. Premium Material & Finishing

    The enclosure body is stamped and formed from thickened high-quality cold-rolled steel plate, with high rigidity and strong load-bearing capacity. The surface is treated with electrostatic epoxy powder coating, which has strong adhesion, uniform color, excellent rust resistance and long-lasting appearance.

  2. High-performance Sealing Design

    The door frame is fitted with a continuous sealing rubber strip, which effectively blocks dust and fine particles from entering the cabinet, ensuring stable operation of internal electrical components. The IP54 protection grade fully meets the protection requirements of general indoor industrial and commercial environments.

  3. High-definition Observation Window

    The window is made of high-strength transparent polycarbonate (PC) material, which is impact-resistant, scratch-resistant and has high light transmittance. The window frame is tightly sealed with the door panel to ensure the overall dustproof and sealing performance of the cabinet.

  4. Precision Manufacturing Process

    Adopting CNC precision shearing and bending technology, the enclosure has accurate dimensions, flat structure and tight assembly gaps. The edges are smoothly treated without burrs, which protects cables and operators from scratches during installation and maintenance.

Customization Service

As a professional enclosure manufacturer, we provide comprehensive one-stop customization solutions:
  • Custom enclosure dimensions, plate thickness and structural design
  • Custom positions and sizes of cable inlet and outlet holes, with matching cable glands
  • Internal configuration assembly: DIN rails, terminal blocks, mounting plates, back panels, etc.
  • Custom color of powder coating and brand logo printing
  • Special lock types, window sizes and additional functional accessories
  • Full non-standard design and production according to customer drawings

Quality Assurance

  • Manufactured under strict ISO 9001 quality management system
  • 100% dimensional inspection, sealing test and appearance inspection before delivery
  • Standard export packaging to ensure product safety during long-distance transportation
  • Damage compensation guarantee: any product damaged during shipping will be replaced free of charge
  • Direct factory supply with competitive bulk pricing and reliable lead time

Installation & Maintenance Tips

  1. Select a flat indoor wall surface for installation, ensure the enclosure is mounted horizontally and vertically to avoid door misalignment.
  2. Before installing internal components, confirm that the enclosure is reliably grounded to ensure electrical safety.
  3. Keep the transparent window clean regularly to maintain good visibility; wipe with a soft cloth to avoid scratches.
  4. Periodically check the sealing strip and lock mechanism to ensure long-term dustproof performance and reliable locking.
  5. Do not modify the enclosure structure or drill holes without authorization, so as not to affect the structural strength and protection performance.

Data Download

LVMA low voltage selection manual

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