Heating elements are usually mounted on which type of insulator?

Heating elements are typically mounted on mica or ceramic insulators due to their excellent thermal resistance and electrical insulating properties. Mica is a natural mineral that can withstand high temperatures without deforming or conducting electricity, making it ideal for applications in electric heating equipment. Ceramics are similarly resistant to high heat and electrically insulating, providing a stable support that keeps the heating element safely isolated from surrounding components and structures.

This choice ensures reliability and safety in operation, as these materials can handle the thermal expansion and contraction that occurs with changes in temperature without breaking down. On the other hand, materials like plastic or rubber are not suitable due to their lower heat tolerance, while glass and metal can either conduct electricity or may not handle the thermal stress well. Wood and paper are also inappropriate due to their flammability and poor heat resistance. Therefore, mica or ceramic is the best choice for mounting heating elements safely and effectively.