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NEMA 4X Electrical Enclosure
Our NEMA 4X enclosures are designed to offer superior protection against water ingress, dust, and chemical corrosion, making them ideal for harsh outdoor or industrial environments. Whether you need stainless steel control boxes for marine facilities or lightweight plastic junction boxes for food processing plants, we provide durable, customizable solutions.
All our enclosures comply with NEMA 4X and IP66 standards, ensuring full protection against water jets, UV exposure, and salt fog. OEM services including cutouts, silk-screen logo printing, and mounting accessories are available to meet your engineering project needs.
Applications include wastewater treatment plants, offshore oil rigs, chemical factories, solar installations, and more.
NEMA 4X Rated Electrical Enclosures
Our enclosures are specifically engineered to protect sensitive electrical components in the toughest industrial environments—providing watertight, dustproof, and corrosion-resistant performance in both indoor and outdoor applications.
Custom Enclosures for Your Specifications
Hofengfab manufactures quality custom and standard NEMA-rated enclosures. Our enclosures can be enhanced by silk-screening, passivation and electro-polishing services.
Contact us today to learn how we can expedite a custom enclosure and produce cost-effective standard NEMA-rated enclosures to protect your equipment.
Manufactured to meet industry standards and maintain environmental rating according to NEMA type.Available from 1 unit onwards with a short lead-time, we can assist you with the creation of your original design.
E-Mail Us：vivian@hofengfab.com
NEMA 4X Rated Electrical Enclosures for Harsh Environments
Waterproof, Corrosion-Resistant, UL-Compliant Enclosures for Outdoor and Industrial Use.
| Item | Details |
| Standard | NEMA 4X / UL 508A Ready |
| Material Options | Stainless Steel 304 / 316, Polycarbonate, FRP |
| Ingress Protection | IP66 (Equivalent to NEMA 4X) |
| Temperature Range | -40°C to +85°C |
| Mounting | Wall Mount / Pole Mount / Panel Mount |
| Customization | Drilling Holes, Cutouts, Silk Printing, Gaskets |
| Color | Metallic / Grey / Customized |
| Dimensions | From 150x150mm to 800x1200mm (Custom Available) |
| Accessories | Mounting Brackets, Cable Glands, DIN Rails |
One-stop service for design, molding, and injection molding.
Custom Fabrication Services
Specializing in precision sheet metal processing, including bending, laser cutting, brushed welding, polishing, stamping, and more.
ON-Time Delivery.
Prototyping typically completed within 10 days.
Standard production lead time is around 15 days, depending on product quantity and complexity.
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FAQ
What is a NEMA 4X enclosure?
A NEMA 4X enclosure is a type of electrical enclosure rated by the National Electrical Manufacturers Association (NEMA) to provide protection against dust, water (including hose-directed spray), and corrosion. It is specifically designed for outdoor and harsh environments, including marine, chemical, and food processing facilities.
What is the difference between NEMA 4 and NEMA 4X?
While both NEMA 4 and NEMA 4X enclosures are resistant to dust, rain, and water spray, NEMA 4X adds protection against corrosion. This makes NEMA 4X more suitable for coastal environments, chemical plants, or food processing lines where exposure to corrosive elements is likely.
🧪 Expert Tip: Choose NEMA 4X if your enclosure will be exposed to salt spray, harsh cleaners, or acids.
Is NEMA 4X equivalent to IP66?
Not exactly, but they are functionally similar. NEMA 4X and IP66 both offer protection against dust and powerful water jets. However, NEMA 4X also includes corrosion resistance, which IP66 does not explicitly cover.
📘 Trustworthy Info: IP ratings are governed by IEC (International Electrotechnical Commission), while NEMA ratings follow U.S. standards. When exporting internationally, it’s good practice to list both.
Are NEMA 4X enclosures suitable for hazardous locations?
Not by default. NEMA 4X only covers environmental protection, not explosion protection. For hazardous areas (Class I, Division 1 or 2), look for NEMA 7/9 or ATEX-certified enclosures.
⚠️ Safety Note: Always consult a qualified engineer or local electrical code before specifying enclosures for hazardous zones.
Where are NEMA 4X enclosures used?
They are widely used in:
Food and beverage processing plants
Pharmaceutical manufacturing
Water and wastewater treatment facilities
Marine and offshore installations
Outdoor control panels
Car wash and washdown environments
🔎 Authority Source: UL and OSHA often reference NEMA 4X as suitable for hygienic and corrosive environments.
Do NEMA 4X enclosures require UL certification?
Not always, but UL listing or certification is often required by local electrical codes, contractors, or industrial buyers in North America. If you’re supplying enclosures to a UL 508A control panel manufacturer, UL-recognized components are usually a must.
✅ Trust Signal: Our NEMA 4X enclosures are UL Recognized, RoHS-compliant, and manufactured under ISO-certified processes.
What is the temperature range for NEMA 4X enclosures?
Typical operational temperature ranges vary by material:
Stainless steel: -40°C to +85°C
Polycarbonate: -40°C to +120°C (short term)
FRP: -50°C to +130°C
🌡️ Trustworthy Advice: Always verify thermal and UV performance with the manufacturer for outdoor or high-temperature applications.
What IP rating should I look for?
IP54 – Dust and light splashes
IP65 – Dust-tight and water-resistant
IP67 – Dust-tight and submersible up to 1 meter for 30 minutes
Choose based on exposure to rain, dust, or immersion.