What Is A NEMA Rating?

With the Summer heat upon us here in Ohio the inquiries for our Cabinet Cooler Systems are increasing by the day.  A question we always ask customers with Cabinet Cooler Sizing Guides is, “What NEMA Type is your enclosure?”  There are quite a few times where no one truly knows what a NEMA rating is. So what exactly is a NEMA rating?

NEMA is the National Electrical Manufacturers Association, one of the many standards they publish is the NEMA rating standard for electrical enclosures up to 1000 Volts.  This standard is where NEMA Types such as 12, 4, and 4X come from (you will also see an international standard reference as “IP”, more on that later).  It categorizes the enclosures by their ability to protect the internal components from things such as corrosion, dust, oil, even external air quality. These standards are reviewed every five years and the last review was done in 2013.  The reviews are generally based on improving safety, clarity of the standard, and testing methods.

So what NEMA ratings does EXAIR offer?  For our Cabinet Cooler Systems, EXAIR offers three very common NEMA types to try an offer a selection to fit the needs that we most commonly encounter.  The NEMA types and their descriptions are below.   For a full list of the Non-hazardous location NEMA enclosure types, click on this link.

EXAIR NEMA 12 Cabinet Cooler System w/ Side Mount Kit

Type 12 (IP54): General purpose, indoor use.  Protects against falling dirt and circulating dust, lint, fibers, and flyings.  Protects against ingress of dripping and splashing water. Rust-resistant Type 12 enclosures do not include knockouts.

 

EXAIR NEMA Type 4 Cabinet Cooler System

EXAIR NEMA Type 4 Cabinet Cooler System

Types 4, 4X (IP66): Water-tight, dust-tight, sleet-resistant.  Resistant to windblown dust.  Indoor or outdoor use.  Also provides protection against splashing and hose-directed water.  The “X” designation indicates corrosion-resistance.

EXAIR's High Temp Cabinet Cooler Systems

The EXAIR Cabinet Cooler Systems also reference an equivalent IEC (International Electrotechnical Commission), IP code.   This is a code from the IEC system which specifies the ingress protection which classifies and rates the degree of protection provided against intrusion (body parts such as hands and fingers), dust, accidental contact, and water by mechanical casings and electrical enclosures. They are a two digit number that represents the level of protection against physical objects and he ingress of water.   Coorelation between NEMA ratings and IP codes is not always possible.  EXAIR has ensured that we also meet the equivalent IP codes shown in the NEMA descriptions above.

If you have a hot enclosure and you are not sure how much cooling is needed or what the NEMA type is, contact us.  We will gladly help you gather the information needed to calculate the heat load requirements and help determine the correct NEMA rating.

Brian Farno
Application Engineer Manager
BrianFarno@EXAIR.com
@EXAIR_BF

EXAIR Cabinet Cooler Systems Control Humidity While Maintaining Internal Temperature

As the weather in the Northern Hemisphere changes over from winter to spring and temperatures start to climb, it is slowly becoming necessary for customers to utilize the Cabinet Cooler Systems to keep control panels cool.

One such situation involved a customer who was building a panel for his client in Malaysia. Malaysia is about 3 degrees north of the Equator, so it is what I would call a semi-tropical if not tropical environment. And such places are quite high in humidity levels. This customer had a client who was in the palm oil processing industry which is quite big in Malaysia. He needed a Cabinet Cooler System to generate about 1000 Btu/hr. of cooling power in a NEMA 12 type system. So I recommended he go with a 1700 Btu/hr. Cabinet Cooler System so he had plenty of capacity. I also recommended he go with 24 VDC thermostat control so he could easily pull the power out from within his panel and not have to run any new circuits.

As the customer duly noted, the fact that the Cabinet Cooler System purges the cabinet with clean, cool and dry compressed air allows for the humidity levels to hang down at a much lower level around 40 – 50% RH instead of up around 80 – 90%. This is attributed to the processing and drying of the compressed air at the production point before it is sent out to the facility and again at the point of use with the included, 5 micron, compressed air filter/separator that comes with each system.

Previously, the customer was using only the small, DC type fans to pull that hot, humid air through the panel which led to many corrosion issues and did not relieve the heat issue at all. With this new improvement, the end user no longer has to worry about such issues. Also, there is virtually no maintenance for this system which produces much longer up-times for the customer as there are no moving parts to wear out. Overall, it was a good recommendation in this case as the Cabinet Cooler System was handling multiple, previously negative issues. Now the pain has been taken away and the end user can move on to solving other, more pressing problems.

Neal Raker, Application Engineer
nealraker@exair.com

Snow Snow Go Away

Enough already! Enough is enough! I am done with Winter!

 

I’m sure that I am expressing the sentiments of  most the nation.   In my sixty some years I cannot remember a winter this severe. I shouldn’t complain though as I have heat and electricity, unlike those who are caught up in the propane shortage.

When you come to think of it, folks in the extreme northern climates deal with this kind of weather as a normal routine. It just proves that we have become so accustomed to a controlled environment, that we have lost our resilience and the ability to cope  outside our comfort zone. I am going to take this as a wake up call and stop complaining and go take the dog for a walk.

With cold gripping the country, you would not think that we would be getting calls for our Cabinet Cooler Systems. Quite the contrary as many control panels are in very warm environments such as foundries, bakeries, etc. Also Summer will be coming soon. It would be best to get a Cabinet Cooler System sized up and ready rather than wait for a heat related shutdown.

CCSizing

Our application engineers are available to help you size up your cooling requirements. We have an online form to outline  the data we will need to size one up properly. One of our engineers will do the calculations for you and get back to you promptly. Remember last summer when that one panel kept tripping out or alarming every time it got too hot…You may be cold now, but don’t let the heat sneak up on you.

Joe Panfalone
Application Engineer
Phone (513) 671-3322
Fax (513) 671-3363
Web: www.exair.com
Twitter: EXAIR_JP

NEMA What?

With the Summer heat beating down most of the nation this week and the calls for Cabinet Cooler Systems are like the temperatures, through the roof, I thought it would be good to discuss the different NEMA types.  EXAIR offers our Cabinet Cooler Systems in three different NEMA types, 12, 4, and 4X.  Below is a description of what each is suitable for.

NEMA Type 12

NEMA Type 12 enclosures are general purpose use enclosures.  These are designed for indoor use and are designed to provide protection against dust, falling dirt, and dripping non corrosive liquids.  This is generally what the enclosures on most metal-cutting machines are rated.  These enclosures are only available for non-hazardous areas.  An enclosure with a NEMA Type 12 may or may not have a gasket seal on the door and on all electrical knockouts.  The EXAIR NEMA Type 12 Cabinet Cooler Systems for these units are available in cooling capacities from 550 – 5600 BTU/hr. along with continuous operation or thermostat control, non-hazardous purge, high temperature operation, and with the EXAIR Electronic Temperature Control.

NEMA Type 4

NEMA Type 4 enclosures are designed to be watertight / weatherproof.  These enclosures are not corrosion resistant but they are able to protect the inside of the enclosure from  a minimum of 65 GPM from a 1″ nozzle delivered from a distance of 10′ for 5 minutes.  These are found in wash down areas where Stainless Steel is not needed along with outside where corrosion is not a concern.  These units can be used on a NEMA Type 12 enclosure for added protection against oil or dirt in the air.  The EXAIR NEMA Type 4 Cabinet Cooler Systems are available in cooling capacities from 550 – 5600 BTU/hr. along with continuous operation or thermostat control, non-hazardous purge, high temperature operation, and with the EXAIR Electronic Temperature Control.

NEMA Type 4X

NEMA Type 4X enclosures are designed with the same specifications as a NEMA Type 4 enclosure with the addition of corrosion resistance.   This means the enclosure must be sealed against wash down and be resistant to corrosion.  The corrosion can come from a chemical or environmental conditions such as a food process wash down or outdoors near the ocean such as on an oil rig or ship dock.  The EXAIR NEMA Type 4X Cabinet Cooler Systems are available in cooling capacities from 550 – 5600 BTU/hr. along with continuous operation or thermostat control, non-hazardous purge, high temperature operation, and 316 stainless steel.

If you have a questions about which EXAIR Cabinet Cooler System is the best fit for your enclosure or you need help sizing the system, feel free to give us a call.  You can also find our Cabinet Cooler Sizing Guide here on the website.

Brian Farno
Application Engineer
BrianFarno@EXAIR.com
@EXAIR_BF

Don’t Get Fired, Install A Cabinet Cooler System

If the weatherman is correct, it is going to be a sizzling hot summer this year with the southern tier states experiencing triple digit temperatures and the rest of the nation in the 90’s.

When it gets hot, controls fail. When controls fail, production shuts down. When production shuts down, the boss yells at you. When the boss yells at you, you tell him where to go. When you tell the boss where to go, you get fired. Don’t get fired. Install an EXAIR Cabinet Cooler system.

EXAIR Cabinet Cooler systems incorporate a Vortex Tube to produce cold air from compressed air – with no moving parts. The compact Cabinet Cooler system can be installed in minutes through a standard electrical knockout. NEMA 12, 4, and 4X Cabinet Cooler systems that match the NEMA rating of the enclosure are available in many cooling capacities for large and small control panels.

EXAIR has a staff of engineers that will assist you in selecting the proper cooler.

Give us a call at 1-800-903-9247.

Joe Panfalone
Application Engineer

Phone (513) 671-3322
Fax   (513) 671-3363
Web: www.exair.com
Twitter: www.twitter.com/exair_jp
Facebook: http://www.facebook.com/exair

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