NEMA 12 ENCLOSURES


Powder coated steel NEMA 12 Floor Mount Enclosure fan cool

Powder coated steel NEMA 12 Floor Mount Enclosure fan cool

TYPE 12 DEFINITION PER NEMA 250 STANDARD

Nemaco manufactures NEMA 12 cabinets to be constructed (without knockouts), for many applications that include indoor used to protect against access to hazardous parts. NEMA 12 enclosures provide protection for equipment inside from harmful effects on the equipment due to the ingress of dripping and light splashing water. Our type 12 enclosure series also gives a degree of protection against ingress of solid foreign objects, falling dirt and circulating dust and provide protection against oil and coolant percolation. 

These enclosures type don’t protect hazard part for corrosion, however, Nemaco also offers them in powder-coated steel, powder-coated aluminum and stainless steel whereby corrosion resistance is required.

NEMA 12 TESTING REQUIREMENTS

To pass NEMA 12 criteria of UL 50, 50E & NEMA 250 Ratings, enclosures and cabinets are required to give protection against circulating dust, dripping, light splashing liquid and oil.
The testing method of NEMA 12 rating is consist of 2 tests

  1. 30 min. Dripping Test
  2. 30 psi (200kPa) Spray Test

Both test must result in no water get inside the cabinets.

COMMON MATERIALS & PROTECTIVE COATINGS

POWDER COATED CARBON STEEL

Carbon steel must be protected with powder coated finishes or epoxy paints for corrosion resistance. Nemaco offers NEMA 12 enclosure made from premium carbon steel with durable powder coated finishes. Other metal coatings (wet paints, marine epoxies) are available on request.

ALUMINUM & STAINLESS STEEL – MATERIAL UPGRADES

In order to better serve customers, we offers material upgrades that include powder coated aluminum and to 304 stainless steel for more corrosion resistance. Additional corrosion resistance can be obtained by requesting a 316 stainless steel upgrade that includes passivation cleaning. Stainless steel passivation is a process to remove and clean residual oxidation caused by welding stainless steel. 

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

FILTERED AIR & AIR CONDITIONING OPTIONS

Filters and fans can be added to type 12 enclosures whereby the fans and filters are protected from dripping and light splashing of water or oils. Sometimes nema 12 cabinets are used near machinery or other equipment that might be using coolant or cutting fluids for machining metals

NEMA 12 ENCLOSURES SUMMARY

Nemaco offers NEMA 12 electrical enclosure series ranging from the wall mount, floor mount, freestanding designs to custom cabinet configurations. The cabinets can be used for indoor or outdoor environments. These products are designed to provide protection from dust, falling dirt, windblown dust/dirt and dripping from leaking pipes for indoor or outdoor locations. Type 12 enclosures and cabinets are commonly 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 instead.

Fan cool information: https://en.wikipedia.org/wiki/Evaporative_cooler

We usually use NEMA 12 cabinets for indoor applications because of their environmental protection characteristics. Type 12 rated enclosures provide a degree of protection against the following: falling dirt and circulating dust. Nemaco manufactures using a NEMA standard to ensure that our customer will get quality enclosures. Furthermore, NEMA 12 gaskets are designed and tested to protect against oil and coolant seepage