Water Heater Line Voltage Thermostat

Choosing the correct NEMA rated line voltage thermostat and its mounting location is vital for ensuring proper functionality and safety. In this guide, we explain the differences between NEMA ratings and provide steps to help you select the appropriate line voltage thermostat for your application. Explore our collection of NEMA rated Line Voltage Thermostats to find the ideal solution for your application.

What is NEMA?

The National Electrical Manufacturers Association (NEMA) defines standards that specify the types of environments where an electrical enclosure can be used. A NEMA rating indicates a fixed enclosure’s ability to withstand specific environmental conditions. Understanding these ratings helps ensure you purchase a line voltage thermostat that operates safely and efficiently in your required environment.

Importance of Selecting the Right NEMA Rating

Using a line voltage thermostat with an inadequate NEMA rating can result in malfunctions or failure, especially if installed in an environment it is not rated for. It’s important to choose a thermostat that meets or exceeds the required NEMA rating for your specific application.

Steps to Determine the Appropriate NEMA Rating

  1. Identify the Mounting Location: Evaluate the environment where the thermostat will be installed. Consider factors such as exposure to water, dust, and outdoor elements.
  2. Understand NEMA Enclosures: Learn about the different NEMA ratings and their suitability for various environments. For a detailed guide, refer to resources like the article by Bud Industries, Inc.
  3. Choose the Right Thermostat: Select a line voltage thermostat that matches the NEMA rating required for your application. Explore our collection of Tempro Line Voltage Thermostats to find the best fit.
  4. Opt for Higher Ratings When in Doubt: It’s acceptable to choose a thermostat with a higher NEMA rating than required. For instance, if your application needs a NEMA 3 rating, you can select a NEMA 3 or any rating above it, but not below.

TP512Benefits of Tempro’s Line Voltage Thermostats

  • Durability: Our thermostats are built to last, with robust enclosures that protect against harsh environmental conditions.
  • Accuracy: Maintain precise control over your temperature settings to ensure optimal performance in your application.
  • Versatility: Suitable for a wide range of environments, from industrial settings to agricultural applications.

Understanding and selecting the correct NEMA rating for your line voltage thermostat is necessary for ensuring safe and efficient operation. By following the steps outlined above, you can confidently choose the right thermostat for your specific needs. A properly rated thermostat will help maintain the integrity and efficiency of your electrical systems, preventing potential issues that could arise from inadequate protection.

For more information or assistance, feel free to contact us.

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Thermostats & Guards

Tempro offers line voltage thermostats & guards commonly found in commercial, industrial and agricultural settings.

Custom Options

Variety of custom options available in both thermostats & guards, such as, temperature ranges, materials, size & private branding.


Tempro products meet NEMA, UL, cUL & NEC 457 Ag-ratings.

High Quality

We take pride in quality control & reliable operation of our components. Every switch is individually tested before it leaves the plant.

Stocked in the U.S.A.

Products are designed & shipped from our facilities in Eau Claire, WI to clients across the globe.