What Is a Non-Metallic Electrical Enclosure?
What Is a Non-Metallic Electrical Enclosure?
Electrical enclosures have traditionally been manufactured from painted steel, stainless steel, or fiberglass. However, advances in engineered polymers have made non-metallic electrical enclosures a preferred solution for many industrial and outdoor applications.
Today's polycarbonate enclosures offer exceptional durability while eliminating many of the challenges associated with traditional metal enclosures.
What Is a Non-Metallic Electrical Enclosure?
A non-metallic electrical enclosure is manufactured from high-performance polymers such as polycarbonate or fiberglass-reinforced polyester rather than metal. These materials provide environmental protection for electrical and electronic equipment while offering excellent corrosion resistance and electrical insulation.
Depending on the enclosure design and certification, non-metallic enclosures are available with NEMA 4X, NEMA 6, NEMA 6P, and IP66/IP67 ratings for demanding indoor and outdoor installations.
Advantages of Polycarbonate Enclosures
Corrosion Resistance
Unlike painted steel, polycarbonate will not rust when exposed to moisture, salt air, fertilizers, wastewater, or chemical washdowns. This makes it particularly well suited for coastal, industrial, agricultural, and municipal installations.
Lightweight Construction
Polycarbonate enclosures typically weigh significantly less than comparable metal enclosures, simplifying installation while reducing shipping costs and structural loading.
Excellent Impact Strength
Modern polycarbonate materials provide exceptional impact resistance, making them suitable for demanding industrial environments where accidental impacts may occur.
UV Stability
UV-stabilized polycarbonate is designed for long-term outdoor exposure without the rapid degradation associated with lower-grade plastics.
Easy Field Modification
Conduit openings, cable entries, and accessory cutouts can often be machined using standard shop tools without concerns about chipped paint, corrosion, or fiberglass dust.
Typical Applications
Non-metallic electrical enclosures are commonly used in:
- Building Automation Systems
- Water and Wastewater Facilities
- Industrial Automation
- Renewable Energy Systems
- HVAC Controls
- Telecommunications
- Transportation Infrastructure
- Oil & Gas Monitoring
- Agriculture
- Marine and Coastal Installations
Choosing the Right Material
Material selection should be based on the operating environment rather than initial purchase price. Factors such as corrosion, UV exposure, moisture, impact resistance, maintenance requirements, and expected service life all influence long-term performance.
For many outdoor applications, polycarbonate provides an excellent balance of durability, corrosion resistance, and ease of installation.
Final Thoughts
Selecting the appropriate enclosure material is one of the most important decisions in any electrical design. Understanding the strengths of non-metallic enclosures can help improve reliability, reduce maintenance, and extend the life of electrical equipment in demanding environments.