Home
Industrial‑Strength 250 kcmil Copper THHN/THWN‑2 Wire – Large Feeder for Tray, Service, and Underground
Conductor ：
Pure Copper
Insulation：
PVC
Jacket：
Nylon
Rated Voltage：
600V
Standard：
UL83
Description
Download
Conductor
Pure Copper
Insulation and Sheath
PVC & NYLON
No. of Conductor
single core
Temperature Rating
90°C(wet) & 90℃（dry）
250 kcmil Copper THHN/THWN‑2 Wire–Extra‑Large Conductor Engineering
This 250 kcmil compact‑stranded copper conductor THHN/THWN‑2 Wire is equipped with a premium PVC insulation and a heavy nylon jacket that resists punctures, chemicals, and sunlight. It is rated 600V and UL 83 listed for 90°C dry and 75°C wet service. The large cross‑section minimises voltage drop over long distances, and the pure copper material ensures exceptional conductivity for the most demanding feeders.
THHN/THWN-2 Cable
THHN/THWN-2 copper building wire is a dual‑rated 600V conductor with PVC insulation and a durable nylon jacket, certified under UL 83 for dry and wet locations. Its excellent heat, moisture, and chemical resistance makes it the standard choice for residential, commercial, and industrial power distribution.
Copper Conductors
Rated Voltage Uo/U (Um) : 600V
Insulated & Jacket：PVC &NYLON
Standards
UL83
Temperature range
90°C (wet)
90℃ (dry）
Advantages of 250 kcmil Copper THHN/THWN‑2 Wire
The 250 kcmil size offers the capacity to handle extremely high currents with low losses, making it the standard for industrial feeder risers and utility tie‑ins. Its robust nylon coating provides superior cut‑through resistance, allowing safe installation in concrete‑encased ducts or underground conduits.
| Conductor Size |
Conductor Stranding |
Insulation Thickness |
Jacket Thickness |
Nominal O.D. |
Approx Net Weight |
Allowable Ampacities(1) @30℃ Ambient |
|
| AWG/Kcmil | Number of Strands |
mils |
mils |
Inch |
lbs/1000ft |
75℃ | 90℃ |
| 14 | 1 | 15 | 4 | 0.101 | 17 | 20 | 25 |
| 12 | 1 | 15 | 4 | 0.119 | 25 | 25 | 30 |
|
10 |
1 | 20 | 4 | 0.150 | 39 | 35 | 40 |
| 14 | 19 |
15 |
4 | 0.113 | 16 | 20 | 25 |
| 12 | 19 | 15 | 4 | 0.133 | 25 | 25 | 30 |
| 10 | 19 | 20 | 4 | 0.164 | 39 | 35 | 40 |
| 8 | 19 | 30 | 5 | 0.218 | 63 | 50 | 55 |
| 6 | 19 | 30 | 5 | 0.252 | 96 | 65 | 75 |
| 4 | 19 | 40 | 6 | 0.325 | 153 | 85 | 95 |
| 3 | 19 | 40 | 6 | 0.353 | 193 | 100 | 115 |
| 2 | 19 | 40 | 6 | 0.381 | 236 | 115 | 130 |
| 1 | 19 | 50 | 7 | 0.437 | 300 | 130 | 145 |
| 1/0 | 19 | 50 | 7 | 0.480 | 373 | 150 |
170 |
| 2/0 | 19 | 50 | 7 | 0.522 | 464 | 170 | 195 |
| 3/0 | 19 | 50 | 7 | 0.572 | 577 | 200 | 225 |
| 4/0 | 19 | 50 | 7 | 0.629 | 719 | 230 | 260 |
| 250 | 37 | 60 | 8 | 0.703 | 857 | 255 | 290 |
| 300 | 37 | 60 | 8 | 0.758 | 1019 | 285 | 320 |
| 350 | 37 | 60 | 8 | 0.808 | 1181 | 310 | 350 |
| 400 | 37 | 60 | 8 | 0.851 | 1342 | 335 | 380 |
| 500 | 37 | 60 | 8 | 0.937 | 1665 | 380 | 430 |
| 600 | 61 | 70 | 9 | 1.036 | 2002 | 420 | 475 |
| 750 | 61 | 70 | 9 | 1.134 | 2465 | 475 | 535 |
| 1000 | 61 | 70 | 9 | 1.273 | 3296 | 545 | 615 |
Certification
UL 83, MTW, UL approved certified, compliant with NEC standard for North American electrical projects.
Environmental Resistance
EMI Shielding Performance
Flame Retardant Performance
UL Certificated
APPLICATIONS
For industrial building, warehouse, HVAC, pump, motor, data center and retail power distribution, plus branch circuits, cable trays, conduits, feeders, service entrances and underground wiring.
Cable Tray & Raceway Systems
In petrochemical plants, this 250 kcmil wire runs in covered trays, its jacket resisting oil mist and high ambient temperatures while maintaining flexibility for expansion loops.
Conduit Wiring
Pulled through large‑diameter PVC conduits, its smooth nylon jacket allows multiple conductors to be installed simultaneously without cross‑binding.
Service Entrance Wiring:
As the primary utility feed for high‑rise buildings, it carries full building load, complying with local code requirements for overhead or underground services.
Feeder Circuit Wiring
Used as a main feeder between switchgear and distribution centres, it carries heavy continuous loads without excessive heating, ensuring stable power for critical processes.
Customer Photos
On-site installation photos for conduit, cable tray and service entrance wiring worldwide.
plant equipment
Full-automatic stranding and jacketing machines, strict size and performance inspection.
Packaging Information
Moisture-proof plastic coil and export wooden reel packing for long-distance shipment.
Plastic Reel
Small Wooden Reel
Large Wooden Reel
Global Certification
Complete official test certificates, support customs clearance and global project bidding.
VDE
UL
SAA
TUV
ISO
What are people saying about us
Reliable factory quality, fast delivery and professional technical support for bulk wire orders.
Luis Fernando Pérez - Venezuela - Office Building Project
The wires are of very good quality. The cables need to pass through long pipes and corners, and the cables are very flexible. We also ordered fire-resistant wires, which have been tested by a testing agency and found to be without problems.
Thomas Baker - USA - Factory construction
GERITEL WIRE's engineering team was very professional. They offered suggestions based on our cable requirements, and we found more suitable cable models. Subsequent operation has been stable without any problems.
Ricardo José Herrera - Dominican - Hotel Project
Due to the tight schedule of the hotel project, we had to adjust the usage quantity several times. GERITEL WIRE supplier was very flexible in terms of delivery and packaging, with fast delivery times. The wire reels were clearly labeled, making on-site counting and distribution very convenient.
frequently asked questions
If you have any questions, you can contact me at any timeDo you have a 24/7 emergency response team to deal with emergencies?
In which regions of the world does your company conduct business?
What after-sales services do you provide?
What is your quality assurance process?
How long is the life of your wires and cables?
Please introduce the founding and development of the company?
What types of wires and cables does your company produce?
Where is your factory?
How long does it take to complete your order?
Do you provide customized wire and cable solutions?
What payment methods are accepted for purchasing wires and cables?
Are your cables certified by industry standards?
Building 2, No. 40 Luxi 2nd Road, Liaobu Town, Dongguan City, Guangdong Province, China
