ABC Wire – THHN / MTW / THWN – 2
SPECIFICATIONS AND STANDARDS THHN THWN – 2
- UL Standard 83 – Thermoplastic Insulated Wires and Cables
- UL Standard 1063 – Machine Tool Wires and Cables
- UL Standard 66 – Fixture Wire
- UL Standard 758 – AWM
- Soft Annealed bare copper (per ASTM B-3) solid or standard (per UL 83)
- Insulation of high quality VW-1 or CT rated PVC (polyvinyl chloride) compound
- Dry rated 90°C, Wet rated 75°C for THWN
- Wet rated 90°C for THWN-2
- Outside jacket of clear, heat stabilized, abrasion resistant nylon
- Rating at 600 Volts
- In accordance with National Electrical Code (NEC) 600 volt use in new construction, remodel or repair
- Used in applications where the maxium operating temperature does not exceed 75°C THWN, 90°C THWN-2 in wet locations and 90°C in dry locations
- Is suitable for use in conduit and raceways installed underground, wet locations and/or where condensation and moisture may occur
- Suitable for power and lightning in commercial, industrial and residental installations and appliance wire applications
- Also suitable for use in cable trays 1/0 and larger
- To be used in compliance with NEC article 310 – “Conductors for General Wiring” and article 210 – “Branch Circuits”
|Size(AWG or kcmil)||Number of Strands||Conductor Size(mm2)|
|Approx. Net Weight(lbs./1000 ft.)|
From our post COMPREHENSIVE THHN WIRE KNOWLEDGE:
WHAT IS THHN THWN Wire?
THHN is the most popular style of copper building wire in the United States. THHN is an acronym which stands for “Thermoplastic High Heat-resistant Nylon-coated.”
THWN is typically dual rated as THHN, and THWN stands for “Thermoplastic Heat and Water-Resistant Nylon-Coated.”
Specifically, THHN THWN is a designation for a particular insulation material, temperature rating, and condition of use (suitable for both dry and wet locations) for electrical wire and cable.
THHN THWN WIRE PRICES
THHN THWN Wire Prices are volatile. They’re volatile because they move up and down each day. Specifically, THHN Wire Prices move so frequently because they are tied to the metals market as THHN Wire is made from copper.
THHN THWN WIRE PRICES USUALLY ONLY VALID FOR 24 HOURS
Furthermore, THHN THWN Wire Prices are usually only valid for 24 hours. As stated above, this is because metal prices change so frequently. Specifically, Copper fluctuates with supply and demand, and the cost of production.
WHAT MOVES COPPER?
For instance, the price of copper could rise significantly during a housing boom, because builders demand record amounts of copper pipe and wiring to build millions of new homes. In a housing bust, the price of copper may drop. Copper and other metals are also tied to the strength of the stock market among many other factors. We have recently seen Copper over $4.00 per lb. The higher copper rises, the more THHN THWN Wire will cost.
If you require THHN THWN Wire Pricing now, contact your Unique Sales Agency salesperson or you can CONTACT US now for a quick price and availability. Thanks!
HOW IS THHN THWN WIRE USED?
First, Copper Wire that is manufactured with THHN THWN insulation is commonly used in Alternating Current systems. The USA and North America utilizes THHN building wire in “AC” systems between 150 volts and 600 volts.
THHN THWN IN COMMERCIAL & RESIDENTIAL CONSTRUCTION.
Typically, THHN THWN building wire is used in commercial and residential construction. Electrical contractors use THHN THWN every day in their projects from coast to coast. Specifically, it is commonly used because it is the cheapest of all the insulated copper building wires on the market.
THHN THWN IN PANEL BUILDING AND MACHINE TOOL MANUFACTURING.
Many times THHN THWN will be dual rated as MTW. MTW stands for “Machine Tool Wire”. Furthermore, MTW conductors are usually used to connect control cabinets or to wire up machine tool applications. Our manufacturer ABC Wire makes THHN THWN that is all rated as MTW. It’s important to note that MTW wire complies with the National Electrical Code (NEC) and NFPA Standard 79.
It’s important to note, most THHN is also dual rated as THWN-2. Furthermore, when you order THHN from our manufacturer ABC wire your wire will be rated THHN-THWN-2-MTW.
THHN THWN -2 WIRE VARIATIONS
First of all, THHN THWN has a few variations that you may not think about too often including Solid or Stranded, Variation of Colors and Stripes, as well as well as a variety of reel sizes. Here’s what you need to know.
THHN THWN COLORS
Frequently, THHN TWHN is sold with a black jacket. However, more and more often, customers are ordering their wire in a variety of colors. This new trend is pushing the manufacturers to keep many different colors on hand to supply the demand.
Especially relevant, any of these color variations can also be combined with different colored stripes. Moreover, a common color that is often kept in stock is Green with a Yellow stripe.
SOLID OR STRANDED THHN THWN?
Important to note, Wire with THHN THWN insulation comes in either solid or stranded, depending on the size you require. Typically, solid THHN THWN is sold up to #10 AWG. AWG means American Wire Guage. AWG is a standardized wire gauge system used since 1857, mostly in North America for electrical wire. When #8 AWG or larger is required typically stranded THHN THWN will be used for more flexibility.
STANDARD THHN-THWN-2 REEL SIZES (PUT UPS).
While ordering, keep in mind you can purchase your wire in many different standard sizes including:
- 500 Foot Reels.
- 1000 Foot Reels (Most Common).
- 2500 Foot Reels.
- 5000 Foot Reels.
THHN THWN SIZES.
First, THHN THWN wire starts at 14 AWG and can be manufactured through 1000 MCM. However, most customers usually only need up to 500 MCM or 600 MCM at the most. Specifically, MCM is an abbreviation for 1000 circular mils.1 MCM = 1 kcmil = 0.5067 square millimeters.
16 AWG AND 18 AWG THHN THWN?
When a customer calls asking for 16 AWG or 18 AWG THHN, they are actually looking for TFN (Solid), or TFFN (Stranded). Actually, yes, both of these are in the THHN family, but it’s important to note the difference.
BIGGER THAN 1000 MCM THHN THWN?
Usually, when sizes are required over 1000 MCM, we recommend XHHW-2 or XLP-USE building wire is used.
Specifically, Both XHHW and XLP have thicker insulation and jackets than THHN. Below is a THHN Size chart from our manufacturer American Bare Conductor showing you all the THHN Sizes they stock, as well as the specifications.