The main difference between thhn cable and nm b cable lies in their usage, physical properties, and application scenarios.
thhn cable, also known as thermoplastic high heat resistant nylon cable, is a type of nylon sheathed wire and cable with excellent electrical and physical properties. Its main features include good heat resistance, corrosion resistance, self-lubricating properties, as well as small outer diameter and light weight. These characteristics make it operate with low weight loss at high temperatures, improve the instantaneous heat overload resistance of wires, and have good corrosion resistance and self-lubricating properties. It is suitable for household appliances, aerospace systems, buildings, lighting and other scenarios.
nm b cable, also known as Romex cable, is a non-metallic sheathed cable mainly used for wiring on walls and ceilings in households. It is commonly used for power distribution within households and has the characteristics of heat resistance, wear resistance, and corrosion resistance, ensuring the safety and reliability of household electrical systems.
In summary, thhn cable are suitable for applications that require higher safety standards and performance requirements, such as buildings and aerospace systems, due to their excellent physical properties and heat and corrosion resistance. nm b cable, on the other hand, are more suitable for wiring inside households, such as wall and ceiling wiring, due to their lightweight and easy installation characteristics.