What is ambient temperature NEC?

Standard air temperature is between 78oF and 86oF according to the 2017 NEC. When ambient temperature is below 78oF or higher than 86oF, then the conductor ampacity must be corrected based on the percentages listed in Table 310.15(B)(2)(a).

What is ambient temperature in electrical?

“Ambient temperature” is a term you will hear often when researching electrical enclosure cooling systems. But what exactly does it mean? In simple terms, it’s the temperature of the air surrounding an electrical enclosure.

What is ambient operating temperature?

The ambient temperature is the temperature at a location not affected by the heat generated by the Power Supply itself.

What does temperature rating on wire mean?

Temperature ratings depend on the heat resistance of the materials used for the insulation and jacket of the cable. The higher a material’s heat resistance, the less likely it will deteriorate in higher temperatures.

How do you find ambient temperature?

Measuring a room or component’s ambient temperature is accomplished by using a thermometer or sensor. In order to make sure the reading is the most accurate, the measuring device should be kept in the shade, in the middle height of the room and in a well-ventilated space that allows the air to circulate freely.

When conductors are installed where the ambient temperature is above?

Those “conditions of use” usually include ambient temperatures above 86°F, or more than three current-carrying conductors installed together in a raceway, cable, or buried in the earth. Or both.

What is an ambient condition?

the physical variables in a particular environment (e.g., temperature, humidity, air quality, noise level, and intensity of light) that, taken as a whole, create an atmosphere that may evoke a distinct feeling or mood. Ambient conditions can be distinguished from specific elements of the environment.

What is an ambient temperature sensor?

Thermometrics Ambient Air Temperature Sensor measures the temperature outside the passenger compartment and is usually mounted inside or near the front bumper. The sensor provides input to automatic HVAC systems to help control the interior temperature of the automobile.