6 Minites to Figure out 5 Questions about THHN Stranded Copper Wire

THHN copper wires and cables are becoming more and more popular with electrical contractors all over the world now? Is it just because it's cheap, yet so versatile? Today dedicated to take with you to see more comprehensive in 6 minutes.

WHAT IS THE THHN COPPER WIRE?

Compared to the ordinary pvc wires or cable, THHN copper wire has the nylon sheath, of course the insulation of THHN stranded wire still be the pvc materials. So we can see it is the nylon sheath that makes the THHN stranded or solid wire own many excellent properties, such as the strong abilty to resist the high temperature, besides oil couldn't enter into the inside of THHN copper wire because of the nylon material. So what is the nylon? We maybe heard of it many times, but we don't know it completely.

Firstly nylon is a kind of synthetic polymer with long history, which was invented by a American before the World War 2 and widely used in many industries now. Second nylon is made when the appropriate monomersare combined to form a long chain via a condensation polymerisation reaction. When people started to use the nylon material as the sheath of electrical cables, we found it was so perfect, besides, the nylon prices had been more and more cheaper.

WHAT IS THE MAIN USE OF THHN BUILDING WIRE？

As one of the most popular electrical wire, main use of THHN building wire embody 3 aspects. Respectively they are household, commercial and industrial buildings. Another thing is how to lay or install the THHN building wire we bought from electrical wires manfacuturer? When we lay the THHN building wire, we need consider the humidity of environment, becouse different wet air condition maybe cause the different properties. Usually we will choose to bundle the THHN wires to strengthen the flexible of THHN copper wire.

WHY THE THHN STRANDED WIRE IS INEXPENSIVE?

As we all know, the price of THHN stranded or solid wires are cheaper compared to other electrical wire, such as the LSZH cables, solar cable. However as we mentioned, the sheath of THHN copper wires are the nylon polymers and in general the nylon sheath is cheaper than XLPE or low smoke zero halogen materials, so in the market all over the world, our building speciality contractors found THHN copper wire cheaper, besides, when they known the wide usage of THHN stranded wire, many contractors chose the THHN copper wire to complete their project. 

WHAT ARE THE COMMON USED THHN COPPER WIRE SIZES?

Now whole electrical wires and cables industry tends to use the UL standard for the THHN copper wire. TOP4 common used THHN stranded or solid wires belong to 12 gauge thhn solid wire, 14 gauge thhn solid wire, 12 gauge thhn stranded wire, 18 gauge stranded wire. 

THERE ARE ANY NEEDS TO CHOOSE A SPECIFIC COLOR FOR THHN COPPER WIRE?

Maybe someone will misunderstand the colors of THHN stranded or solid wire, electrical contractors will think that the color of the THHN copper wire is presented by the nylon material, actually nylon sheath is transparent, the innner pvc insulation decides to the color presentation of THHN stranded or solid wire. In general , there aren't special meaning on the color choice of THHN copper wire. Usually the black, green, yellow, blue belong to the most common accepted by majority of electrical contractors all over the world.