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The reality is that the UL testing is the same for both IEC and NEMA starters. As a result, the IEC system itself is blamed when it doesnвЂ™t perform as expected. Oftentimes, the wrong IEC classification for a given application will be utilized. In actuality, itвЂ™s simply oversized by design. Visually the NEMA starter looks larger than the comparable IEC starter and some think this makes it вЂњmore robustвЂќ. This is where many misunderstandings have arisen in the United States with respect to the IEC system. IEC will also have many more options for a particular current or power rating, which makes proper selection much more critical than with NEMA components. More versatile ratings are broad and apply to many different applicationsДЄs a result, particularly for devices below 100A or 50HP, the NEMA-rated motor starters and contactors are going to be much larger and much more expensive. Less versatile designed to meet life/current requirements in specific applications

AC-4 is similar to AC-3 but includes вЂњinchingвЂќ and вЂњpluggingвЂќ (jogging and reversing at speed), which requires significant instantaneous control of the motor current. AC-3 is for routine starting and stopping of a squirrel cage motor and only occasional jogging. For example, a utilization category of AC-1 is for purely resistive loads, or only slightly inductive loads, like a heater circuit. The difference between IEC vs NEMA is that a NEMA contactor, by design, may have up to 25% service factor while IEC is more focused on space and cost savings by testing components to their exact design rating and using utilization categories to rate devices based on their intended use.

Versatile and suitable for a broad range of applications.

Founded in 1926, NEMA urged manufacturers to utilize a standard вЂњframeвЂќ size to allow parts from different manufacturers to be standardized, and to design components with safety factors over and above their design ratings. The National Electrical Manufacturers Association (NEMA) is the largest trade association of electrical equipment manufacturers in the United States. This organization traces its roots back to 1881 and has been involved in developing and distributing many well-known units of measure like Hertz (frequency вЂ“ cycles/second) and Gauss (magnetic flux density). The International Electrotechnical Commission (IEC) is a non-profit, non-governmental international standards organization that prepares and publishes international standards for all electrical, electronic, and rated technologies, which are collectively referred to as вЂњelectrotechnicalвЂќ. Read on to learn more about the two different standards organizations and which one might suit your intended application best! What is IEC? With so many different electrical contactors and starters to choose from, you may be curious about the pros and cons of IEC vs NEMA rated devices. The frame size and color that is available for this model is Black-Cranberry,Blue-Brown,Brown-blue crystal and size(s) of 52-17-140.Home В» About Us В» News В» IEC vs NEMA: Which is Best? IEC vs NEMA: Which is Best? Please call or email us so we can help you return the frame to the manufacturer. The EX3148 has a one year warranty, which means if there is a manufacturing defect due to workmanship, they may be exchanged at no charge. The temples are 140mm in length, therefore, they wrap over your ears.

The bridge is 17mm, which should allow a comfortable fit on a person with a shallow bridge on their nose.

EXCES FRAMES FULL

This specially designed eyeglass frame shape is a Rectangle and features a Full Rim construction. This frame is beautifully crafted for women. Most brand name designer frames come with an authentic case. This designer eyeglass frame is made of acetate. Our friendly elves pack and ship all of our beautiful EX3148 by Eastern States Eyewear.

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