What does the letter "H" stand for in insulation characteristics?

The letter "H" in insulation characteristics stands for "Heat resistant." This designation indicates that the insulation can withstand elevated temperatures without degrading or losing its insulating properties. It's crucial for applications where electrical components might generate significant heat or where they will be exposed to high-temperature environments, such as in industrial machinery or oven controls. Understanding this characteristic aids in selecting the right insulation material for specific applications to ensure safety and functionality.

Other options may refer to different concepts or characteristics but do not align with the recognized terminology for heat resistance in insulation materials.