NEMA 4 Enclosures & Boxes

NEMA 4 enclosures and boxes are used primarily for protecting electrical equipment in indoor environments.

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What Is a NEMA 4 Enclosure Rating?

NEMA is a rating system for equipment that might be exposed to liquids, rain, ice, corrosion, and contaminants such as dust.

Type 4 NEMA Enclosure is Intended for indoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose-directed water; undamage by ice which forms on the enclosure.

NEMA 3 Enclosure

A Nema 4 Enclosure For Your Application

Some of the basic types of nema 4 electrical enclosures that you’ll find on the market today include:

Features of Nema 4 Enclosure

  • Indoor and Outdoor Use: NEMA 4 enclosures are ideal for both indoor and outdoor use, offering reliable protection against water, dust, and other environmental threats.
  • Waterproof Design: These enclosures are intended to prevent water infiltration from hose-directed spray, splashing water, and external condensation, guaranteeing the integrity of the contained equipment.
  • Construction: Typically made of corrosion-resistant materials like stainless steel or fibreglass, which provide durability and protection against severe conditions.
  • Gasket Sealing: NEMA 4 enclosures use gasket sealing to keep a watertight seal and prevent water entry.

Advantages And Disadvantages For NEMA 4 Enclosure

Advantages

  • Weather Protection: Provides dependable protection from a wide range of exterior factors, including windblown dust, rain, sleet, and external ice development.
  • Durable Construction: Made from high-quality materials that can resist external conditions and provide long-term protection for enclosed equipment.
  • Versatile Options: Available in a range of sizes and configurations to suit various types of equipment and installation needs.

Disadvantages

  • Cost: Because NEMA 4 enclosures have better waterproofing and corrosion-resistant characteristics than lower-rated enclosures, they may be more expensive.
    Installation
  • Considerations: Ensuring the watertight seal of the enclosure and its defence against environmental risks depend on a correct installation.

Custom Your NEMA 4 Enclosure

We provide personalized solutions to match your exact needs, ranging from custom sizes and materials to specialized features and branding. 

Learn how to select the right size and material for your needs. Contact us for more information!

Comparison with Other NEMA Ratings

  • NEMA 3R:  NEMA 3R is similar to NEMA 3 but with lower windblown dust protection standards. Suitable for outdoor usage, however, dust protection may not be as effective.
  • NEMA 4X: Provides protection against splashing and hose-directed water, and is ideal for both indoor and outdoor usage.
  • NEMA 6: Suitable for uses when equipment may be subjected to extended water immersion, designed for brief submersion in water.
  • NEMA 12: Protects against dust, grime, and non-corrosive liquid spills, making it ideal for industrial applications.