Heavy Rain(water jet) Resistance Cabinet and Enclosures

ul listed approved for nemaco nema type 4 enclosure cabinets boxes
Air Conditioned NEMA 4 Server Rack Enclosure With Caster Wheels

Air Conditioned NEMA 4 Server Rack Enclosure With Caster Wheels

Reference Section for the NEMA type 4 Enclosure, Boxes & Cabinet Designs

This page is Nemaco Technology’s reference section to provide technial information for NEMA 250Type 4 enclosure designs. Also we will provide internal and external photo images of the NEMA 4 enclosures which are from our production line. You can call or contact Nemaco for additional technical information. Let Nemaco find the right NEMA 4 enclosure solution for your industrial, commercial or military application. Also, note that Nemaco can customize most enclosures for our customers.

Nemaco offers NEMA 4 enclosures in various size from small to large cabinets for industrial applications to protect and housing electrical components in both the indoor and outdoor environment. We manufacture every our enclosures adherence NEMA 250 type 4 standards (National Electrical Manufacturer Association) to ensure quality on every electrical enclosures to our customers at a competitive price.

Enjoy the material that Nemaco has prepared for you, and if you have any questions, please contact Nemaco by telephone or complete our contact form.

NEMA 4 rating series are intended to use mainly in an outdoor environment, where the protection from the heavy rain is required. Nemaco’s NEMA 4 electrical enclosures are TESTED and APPROVED BY Underwriters Laboratories(UL) and offer them as an option for our customers. We ensure customer by testing these type 4 rating enclosures using hose directed water hose product water at 65 gals. or 246L /min to ensure that the enclosures will give protection at type 4 rated.

Nemaco manufacture these enclosures in a different styles, various sizes from small to vert large and many choice of materials, we also make custom weaterproof enclosures cabinets and boxes to provide perfect NEMA 4 enclosure solution.


Definition: NEMA 4 enclosures provide protection against solid objects such as falling dirt, circulating dust, airborne dust, and windblown dust. Similarly, they give the same level of protection against ingress of water, dripping, light splashing, splashing and hose down (directed) water. Generally, they are constructed for either indoor or outdoor uses. However, these enclosure type doesn’t give you a corrosion resistance ability, if it needed please see our NEMA 4x enclosures series or ask Nemaco about powder coat finish for surface protection.

Characteristics of NEMA 250 type 4 enclosure and cabinet

  • Indoor or Outdoor applications
  • Protection from hose directed water, rain, ice formation, foreign substances and windblown dust (airborne circulating dust and settling particles) in the outdoor environment.
  • Protection from falling dirt and dripping water from pipes in the indoor environment.
  • Provides protection for electrical equipment from incidental contact.



Nemaco offers NEMA 4 rating enclosure series made from premium grades of carbon steel with oven baked & durable powder coated finishes. Our standard door handles and door turn knobs are powder coated. But customers can request upgrades to stainless hardware with other interesting features.

Wall mount Nemaco NEMA 4 enclosure with sun shield

Nemaco Wall Mount NEMA 4 enclosure with sun shield


In order to better serve customers, we offers material upgrades to include powder coated aluminum and to 304 stainless steel for more corrosion resistance. For customers requesting stainless steel with additional corrosion resistance, then customers can request a materials upgrade to 316 stainless steel with passivation. Stainless steel passivation is a process to remove and clean residual oxidation from welding and stainless steel contamination. These upgrade will make enclosures meet type 4x protection.

For customers working on unique projects, they can send an email to us for assistance and we can possibly offer new “out of the box” solutions. Call Nemaco if you have any questions about material selection or cabinet selection for industrial applications.

Our Designs of NEMA 4 rating Electrical Enclosures

Wall Mount

Our NEMA 4 wall mount enclosures are designed for the customer to mount it on a hard wall, wood, concrete and more in case want to lift it up over the floor or put it on the wall outside the building. These designs allow you to easily access your electronic from the front of the enclosure.

Wall Mount Enclosure (Custom-Built NEMA 4 wall mount with JIC latched door)

Floor Mount Enclosures

NEMA 4 Floor mount enclosures are designed for the customer to mount it to the hard floor such as wood, concrete and more. These designs allow you to easily access your electronic from the front of the enclosure with one door with 3PT latch lock.

Double Bay (Doors) Cabinets

Mobile Wheels Enclosures (1 Door)

Mobile Wheels Enclosure (2 Doors)

Climate Control Enclosures (1 Door)

Climate Control Enclosures (2 Doors)


Nemaco offers NEMA 4 electrical cabinet and enclosure products with a full range of wall mount, floor mount, free standing cabinet, junction box, pull box and custom configurations. The enclosures can be used for indoor or outdoor environments. Our products are designed to provide protection against heavy hose directed spray wash-down, rain, snow, ice, falling dirt, windblown dust/dirt and dripping from leaking pipes for indoor or outdoor locations. These type 4 rating enclosures are typically powder coated steel and therefore provide fair corrosion with a powder coat finish. For customers needing more corrosion resistant then they should consider using (304 / 316L) stainless steel, upgrade for nema 4x rating instead.

  • Outdoor protection from hose directed water, rain, ice formation, foreign substances and windblown dust (airborne circulating dust and settling particles). 
  • Indoor protection from falling dirt and dripping water from pipes. 
  • Provides protection for electrical equipment from incidental contact. 
  • Additional protection is corrosion. 
  • Powder Coated Carbon Steel (HR / CRS) – Strong & Durable  
  • Powder Coated Aluminum (5052, 6061) – Low Weight   
  • Stainless Steel (Material Grades 304/316) – Strong, Durable, Corrosion Resistant  

Nemaco manufactures quality NEMA enclosures rated. Call us for suitable materials, designs and cost-effective for your NEMA 4 enclosures and cabinets to your projects.

Minimum/Maximum Height24"/72"
Minimum/Maximum Width24"/24"
Minimum/Maximum Dept24"/42"
Size Range
depend on Enclosure type
• 24" x 24" x 24"
• 72" x 24" x 42"
Air condition• 1000 BTU NE010126-04 (30 lbs)
• 6000 BTU NE060126-04 (121 lbs)
19" Server rack railAvailable call us for detail
Powder coating colors• White
• Light Gray
• Dark Gray
• Black
Footings• 8” footing
• 12” footing
Material• Carbon steel
• Aluminum
• Stainless Steel
Insulation• 1/2” thickness
• 3/4” thickness
Handle• Key locked handle
• Pad locked Handle
Interior Panel - Options• Aluminum(non coated)
• White Powder Coated Steel
• 304 Stainless (2B Finish)
Interior Panel - Size Range• 21" X 21"
• 69" X 21"
** To calculate maximum interior panel size for your cabinet
panel size = cabinet size - 3"
Custom options• ROXTEC™ seal solutions
• NPT fittings
• GND studs
• Lexan Window
• Sun Shield
• Coupling
• Thru Hole

Follow links below for more different types of NEMA enclosure from NEMACO™ that give different protection degree
NEMA 3R Enclosures
NEMA 4X Enclosures
NEMA 6 Enclosures
NEMA 6P Enclosures
NEMA 12 Enclosures