HR cable is a heat resistant cable can be used in temperatures up to 180°C flame retardant applications. A good hr fr wire has the properties of flame retardant, PTFE material will be able to sit in a heat proof wire without catching fire, and if the flame is strong enough to ignite the PTFE insulation or sheath, it will self-extinguish once the flame source is removed from the hr cable.

The HR cable extreme flexibility is good for many electrical applications where PTFE insulation is needed. The heat resistant cables do not heat-up and are also chiefly demanded in reactor & process control, navy sector, high-temperature control value furnace & oven.

It is the action of heat proof wire delaying the spreading of fire for a time. For example, there are special teflon coatings act as a heat resistant cable inside electric fuse boxes and high performance industrial machines. These teflon coatings are made of materials that do “charring” when exposed to fire. The heat resistant wires are made to keep circuits intact and work for a certain amount of time under specific conditions.