What are the colors of the conductors of a type J thermocouple?

The correct answer is based on the standardized color coding for type J thermocouples, which are composed of iron and constantan. In the case of a type J thermocouple, the positive lead is identified by the color white, while the negative lead is indicated by red. This specific color coding is essential for correct installation and operation, ensuring that the thermocouple is connected properly to the measuring device for accurate temperature readings.

Understanding this color convention is crucial because it helps prevent errors in wiring that could lead to incorrect temperature measurements. Knowing that type J thermocouples utilize white for the positive side and red for the negative allows technicians and installers to ensure that they maintain accuracy in temperature sensing tasks across a variety of applications.