NEMA-Rated Enclosures Manufacturer
We manufacture high-quality NEMA-rated enclosures designed to protect electrical components from dust, water, corrosion, and environmental hazards. Whether you’re working in harsh industrial settings or outdoor installations, our NEMA enclosures offer reliable and certified performance.
Understanding NEMA Ratings
| NEMA Rating | Protection Level | Typical Application |
|---|---|---|
| NEMA 1 | Indoor, basic protection against dust | Control cabinets in dry environments |
| NEMA 3R | Rainproof, suitable for outdoor use | Utility boxes, solar system panels |
| NEMA 4 | Watertight, resists splashing and hose-directed water | Indoor/outdoor washdown areas |
| NEMA 4X | Same as NEMA 4 + corrosion resistance | Marine, chemical, food processing |
Our NEMA-Rated Enclosure Products
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Vililong Product Display
NEMA 3R Powder-Coated Steel Enclosure
Compact, Corrosion-resistant,CE,IP65
Introduction
The NEMA 3R Powder-Coated Steel Enclosure is designed for reliable outdoor performance. It provides protection against rain, snow, and sleet, making it ideal for utility, solar, and general electrical applications. The powder-coated finish enhances corrosion resistance and ensures a clean, professional appearance.
Material selection
-Powder-Coated Steel
Support
Custom sizes｜Material thickness｜Filter&Fans｜Pre-cut holes for cable entry and ventilation｜Custom Logo/Text
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Vililong Product Display
NEMA 4 Wall-Mounted Cabinet
Compact, Corrosion-resistant,CE,IP65
Introduction
The NEMA 4 Cabinet is a fully enclosed, watertight solution designed to protect electrical equipment from dust, rain, splashing water, and hose-directed water. Ideal for use in industrial facilities, food processing plants, and outdoor settings where frequent cleaning or exposure to moisture is expected.
Material selection
-Powder-Coated Steel
Support
Custom sizes｜Material thickness｜Pre-cut holes for cable entry and ventilation｜Custom Logo/Text
Learn more
Vililong Product Display
NEMA 4X Stainless Steel Enclosure
Flexible & Expandable system,CE,IP65
Introduction
The NEMA 4X Stainless Steel Enclosure is built for extreme conditions where both water and corrosive elements are present. Made from high-grade SUS304 or SUS316 stainless steel, it provides full protection against dust, high-pressure water jets, and chemical exposure. It is ideal for applications in marine, chemical processing, food and beverage, and pharmaceutical industries.
Material selection
-SUS304
-SUS316
-SUS316
Support
Custom sizes｜Material thickness｜Cabinet air conditioning｜Pre-cut holes for cable entry and ventilation｜Custom Logo/Text
Nonstandard NEMA-Rated Enclosure Are Customizable
0. Consultation (Optional)
Discuss project requirements, application conditions, and enclosure recommendations.
1. Submit Your Design
DWG, STEP, PDF, or even a sketch — we accept all formats and provide quick feasibility checks.
2. Technical Evaluation
Our engineers review structure, materials, cutouts, and protection level requirements, offering optimization if needed.
3. Prototyping & Sampling
Prototype or small-batch samples are produced to verify dimensions, fitment, strength, and surface finishing quality.
4. Mass Production
After approval, full-scale fabrication begins—laser cutting, bending, welding, assembly, and coating under strict QC.
5. Packing & Delivery
Finished enclosures are inspected, packaged with protective materials, and shipped globally by sea or air.
Comprehensive Customization Options for Your NEMA-Rated Electrical Enclosures
Size
Custom width, height, and depth tailored to your installation and component layout needs.
Color
Industrial-grade RAL powder coating for safety identification and corrosion resistance.
Material types & Thickness
Cold-rolled steel, stainless steel, galvanized steel, or aluminum with selectable thickness based on strength and protection requirements.
Door and hinge Types
Single-door, double-door, reinforced door designs, concealed or lift-off hinges.
Door Locks
Quarter-turn locks, key locks, padlockable handles, and compression latches.
View Windows
Polycarbonate or tempered-glass viewing windows for safe equipment monitoring.
Mounting Plate
Custom mounting plates for breakers, relays, contactors, and internal components.
UV Printing
Durable UV printing for labels, warnings, logos, or control panel markings.
Enclosure Rating
IP54 / IP55 / IP65 and NEMA protection levels based on sealing design and environment.
Accessories
Cooling fans, ventilation louvers, lighting, brackets, cable glands, document holders, etc.
Cutouts & Machining
Laser-cut openings for switches, displays, connectors; CNC machining for precision interfaces.
Surface Finishing Options
Powder coating, spraying, galvanizing, brushing, polishing, and anti-corrosion treatments.
Why Choose Our NEMA-Rated Electrical Enclosures
Wenzhou Vililong Technology Co., Ltd.
Vililong is a direct manufacturer of NEMA-rated electrical enclosures, designed to protect critical electrical systems in demanding industrial and outdoor environments.Our enclosures are engineered to meet global protection standards, including NEMA 1, 3R, 4, and 4X, ensuring reliable performance against rain, dust, corrosion, and washdown conditions. This makes them ideal for applications in power distribution, infrastructure, oil & gas, and outdoor automation systems.
Manufactured using high-quality materials such as powder-coated steel and stainless steel (SUS304 / SUS316), our NEMA enclosures provide superior corrosion resistance, structural strength, and long service life in harsh environments.With in-house sheet metal fabrication — including laser cutting, CNC bending, and precision welding — we ensure tight tolerances, consistent quality, and reliable sealing performance.
We support full OEM/ODM customization, including size, material thickness, surface finishing, cutouts, and mounting solutions — helping contractors, panel builders, and distributors deliver reliable projects worldwide.
0Years experience
Electrical Enclosure
Manufacturing
Manufacturing
0Employees
R&D, design, production
Technical team
Technical team
0Countries
Exported to 20+ Countries
0Enclosures
5000+ Enclosures Delivered Annually
Real factory environment in Wenzhou, China Supporting small batch and mass production
Manufacturing Capabilities
Laser Cutting Machine
It can be used for cutting a variety of metal materials and has the advantages of fast processing speed, fine workmanship, strong adaptability and high flexibility..
CNC Bending Machine
Precise and accurate CNC bending equipment. Customized design to meet your multiple bending needs.
Bending Machine
Large tonnage bending machine to meet customer requirements for large box.
Professional Drawing
Professional sheet metal engineers to meet customer customization needs.
Quantity Production
5000 square meters of plant and professional production equipment and personnel, to meet the mass production of customers.
Welding Robot
Panasonic welding robots provide you with reliable peace of mind and assured products
From Production to Delivery — Reliable Manufacturing Process You Can Trust
Certified Electrical Enclosure Manufacturer
CE
IP65
ISO9001
Why Global Buyers Choose Vililong
Vililong is a direct manufacturer of industrial electrical enclosures, specializing in custom and OEM solutions for global markets.With in-house sheet metal fabrication, strict quality control, and fast response capability, we help customers reduce costs, shorten lead times, and ensure reliable performance in real applications.
Direct Manufacturer
Work directly with our in-house manufacturing team. No middlemen, better pricing, and full control over quality, lead time, and customization.
Fast Sampling & Stable Delivery
Quick sample turnaround and flexible production scheduling help you meet tight project deadlines with confidence.
Strict QC System
Every enclosure is inspected during production and tested before shipment to ensure consistent quality and reliable performance.
Built for Industrial Applications
Designed for long-term use in demanding environments such as power distribution, automation, and outdoor installations.
How to Choose the Right NEMA-Rated Enclosure
A practical guide from 20+ years enclosure manufacturing experience
Understand NEMA Ratings
Choose the correct protection level based on your environment. NEMA 1 for indoor use, 3R for rain protection, 4 for washdown conditions, and 4X for corrosion-resistant applications.
Indoor vs Outdoor Use
Outdoor installations require higher protection against rain, dust, and UV exposure. NEMA 3R, 4, or 4X enclosures are commonly used for outdoor electrical systems.
Material Selection
Powder-coated steel is cost-effective for general use, while stainless steel (SUS304 / SUS316) is ideal for corrosive environments such as marine, chemical, or food industries.
Sealing & Protection
High-quality gaskets and sealing design are critical for maintaining IP and NEMA ratings. Poor sealing leads to water ingress and equipment failure.
Customization Requirements
Consider cutouts, cable entries, mounting plates, and ventilation. Custom enclosures ensure better installation efficiency and system compatibility.
Compliance & Standards
Ensure your enclosure meets required standards such as NEMA, IP ratings, and project-specific certifications to avoid compliance issues in your target market.
Not sure which NEMA enclosure fits your project?
Our engineering team can recommend the best solution based on your application, environment, and budget.
Frequently Asked Questions
What’s your company main products?
The main business is to provide customers with custom enclousure services, we also sell some General Boxes.
How about the price of the product?
We are a manufacturer, we mainly provide customized services for our customers, and we believe that our prices have enough advantages.
What does the enclosure customization service contain?
Box Sizes,Box Colors,Door Types,Gland Plates,Specific Cutouts,Moutning Plates,Protective Covers,Standing Types,Windows,Thickness,Accessories.
Can we get the sample? Is it free?
Yes, we could offer the general box sample for free charge,but need you pay the express. The freight depends on weight, packing size and your country or province region, etc.
What’s about MOQ?
First order MOQ=1pcs.
How can I get product catalogs?
You can get the catalogs by contacting us.
How to order our product?
1.Please tell us the model and quantity and other request you need.
2.We make the PI for you.
3.After you confirm the PI, we arrange the order for you after receiving your payment.
4.After the goods finished, we send the goods out to you and tell you the tracking number.
5.We will track your goods until you receive the goods.
How about the after-sale service?
If you meet any problems after sales, pis contact us freely, we’ll help solving the problems within 24 hours.
What’s the payment term?
100% T/T (large order, accept 30% T/T prepay 70% balance before shipping), Western Union, Paypal.