8 minutes to know the difference between THHN and THWN copper wire

THHN copper wire , also known as thermoplastic high heat resistant nylon coated wire or THHN stranded wire , is a common wire used to connect branch circuits and electrical appliances. It is also known as THWN (or THWN-2) by its counterpart. This thermoplastic heat-resistant and waterproof nylon-coated wire is designed to operate in the same environment as the THHN, and can still be used in harsher environments when laid without the addition of additional components. THWN is considered an evolution of THHN, so both are still widely used by construction workers.

THWN copper wire

The main reason to use THWN wire is to use it in water resistance. These wires still do not require conduit in wet environments; this flexibility makes them the wire of choice for builders, as neither wire type needs to carry conduit in wet environments. Because THWN wire has a separate PVC jacket, unlike wire with only one layer of PVC insulation, the PVC jacket can help with waterproofing.

THHN stranded wire

THHN wire is the original version of the nylon jacket. Wire designed to withstand high temperatures up to 194 degrees Fahrenheit, this resistance drops to 167 degrees in the event of oil exposure. THHN wire is usually two-conductor and can be found in the familiar US-style wiring used to connect all homes and other structures. For underground and conduitless installations, UL83 certified thhn wire should be selected.

The Difference Between THHN and THWN copper wire

As can be seen from the above, the THWN wire is quite the evolution of the THHN wire, so the two are very similar, although there are many similarities and most of them are the same in use, but there are still small differences, I can have here The difference between the two points is that the conductor has a different size, and the other is the different heat resistance of the sheath, because the heat resistance of the sheath of thwn is slightly lower than that of thhn wire.

Common THHN and THWN of stranded wire

THHN and THWN wires are generally of the same voltage rating; in most environments where both wires are used, the difference between the two is minimal. As a result, most wire manufacturers decided to make them into one product. Both offer the same range of specifications, available in solid and stranded versions, and rated at 750 volts. But this is wrong, because the heat resistance of the two kinds of sheaths is still a little different. In order to cope with different environments and make the nylon wire last longer, insist on the distinction between thhn and thwn and thwn-2 in the nylon wire. Very necessary.

The above is the introduction of " the difference between THHN and THWN copper wire, and the common features", I hope it can help everyone! Please continue to pay attention to JZD Cable for more information.