There is not a very big difference between these types of wire. They all have the PTFE insulation. The wires are an indoor electrical wire that is approved for 200°C. All of these forms are also resistant to gas, oils and water. These wires are easy to install because of their small size and the slippery surface. PTFE also has excellent and stable electrical characteristics with lower power loss. This makes them ideal for high frequency applications. The biggest difference between the types of wire is the level of voltage in which they are approved.

Type ET Wire

The ET wire has a voltage rating of 250 volts and meets M16878/6. The wire can withstand temperatures as low as -60°C and temperatures as high as 200°C. It is also made with the extruded PTFE insulation and it passes the UL VW-1 flame test. This kind of wire could be used either indoors or outdoors because it is resistant to so many kinds of chemicals as well as water.

Type E Wire

This E type of wire has a voltage rating of 600 volts and meets M16878/4. The wire is non-stick and is intended for electrical or electronic use. This means that the wire is in protected applications where high temperatures will be encountered. This is where the wires excellent resistance to thermal aging is so helpful. This type of wire also has the same temperature range as the type ET wire.

Type EE Wire

The type EE wire has a voltage rating of 1000 volts and M16878/5. It has the exact same temperature range as the type ET and E wires as well. It is also made from the same stranded silver plated copper and has the same PTFE coating around it. These types of wires also all meet the UL 1180 and M16878 military specification.

These types of wire are pretty similar overall. All of these types of wire have an excellent resistance to thermal aging, solder iron damage, flames and moisture. There is a silver coating over the copper to help with corrosion from high temperatures. The special PTFE coating that all the wires come in is also resistant to solvents, greases, ozone, and most other chemicals. These wires come in gauges from 24 all the way up to a 14 gauge wire. These wires are great for both indoor and outdoor uses where a high temperature rating is required.