In order to determine which NEMA rating your NEMA 4X thermostat should have and where you can mount it, you must first understand its’ NEMA rating, and the differences between ratings. In this post, we will explain the differences between these ratings. By following our steps, you can ensure you will purchase the right line voltage thermostat for your application.
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What Is NEMA?
NEMA is described as: “standards that are useful in defining the types of environments in which an electrical enclosure can be used” and is defined by
the National Electrical Manufacturers Association. The rating frequently signifies a fixed enclosure’s ability to withstand certain environmental conditions.
All in all, it is important that you purchase the right NEMA rated line voltage thermostat to ensure safe use in the environment you require. Installing a line voltage thermostat outside that is not high on the NEMA rating scale can cause your thermostat to malfunction or cease to work properly.
Steps determine which NEMA rating your line voltage thermostat should have
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- First, determine where you want your line voltage thermostat mounted. Do this by looking at its surroundings. For instance, will the thermostat get wet often? Is it exposed to the elements of the outdoors?
- Second, determine what NEMA enclosure your thermostat will need. This article by Bud Industries, Inc. is a great guide and does an excellent job of describing different NEMA ratings.
- Third, locate a line voltage thermostat that best fits the NEMA rating you need for your application.
- Finally, remember that it’s ok if you purchase a higher rated NEMA thermostat than you need. Just be sure it’s equal to or above what your application requires. For example, if your application requires a NEMA 3, you can purchase a NEMA 3 OR anything above, but nothing below a 3.
