Name: China Single Conductor Building Wire THHN/THWN-2 Building Wire Manufacturers Suppliers Factory - Greater Wire
Brand: Greater Wire
SKU: 312276316

Description

Technical Parameters

Certification

Dongguan Greater Wire & Cable Co., Ltd. is one of the leading manufacturers and suppliers of single conductor building wire thhn/thwn-2 building wire in China, also supports customized service. Please rest assured to wholesale durable single conductor building wire thhn/thwn-2 building wire made in China here from our factory. If you have any enquiry about free sample, please feel free to email us.

250 kcmil THHN wire

PRODUCT REAL SHOT

250 kcmil copper THHN wire

Nylon Covered Copper Wire for Contractor and Distributor Supply

For overseas electrical buyers, GERITEL WIRE single conductor building wire offers a straightforward 600V building-wire solution with a structure widely recognized in the North American market. The product uses a copper conductor with PVC insulation and a nylon outer covering, helping buyers identify the construction quickly during specification review and purchasing. Buyers sourcing nylon covered copper wire typically prioritize clear 600V identification, copper construction and dependable supply for building electrical distribution. GERITEL WIRE works with electrical distributors, contractors and project procurement teams on specification confirmation, printing, packing and delivery documentation before production.

PRODUCT SPECIFICATIONS

250 kcmil copper THWN-2 wire

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

CERTIFICATIONS

250 kcmil 600V building wire

PACKAGING

Plastic Reel

Small Wooden Reel

Large Wooden Reel

APPLICATION

Cable Tray Raceway Systems

Underground Conduit Installation

Branch Circuit Wiring

CASE

Mayo Clinic Hospital, Saint Marys Campus

30 Hudson Yards

Stanford University California USA

WHY CHOOSE US

30Years of experience
in one-stop service

Dongguan Greater Wire & Cable Co., Ltd. is a professional engineering-grade cable manufacturer in China, supplying certified electrical cable solutions for building, industrial, mining, energy, and infrastructure projects worldwide.

With a 30,000 m² factory, 30 production lines, experienced engineers, and a strict quality control team, we provide reliable, traceable, and compliant cable products for international engineering applications. Our products are supported by certifications including SAA, UL, cUL, VDE, TÜV, CE, CB, IEC, BPS, and ISO.

We are committed to safety, quality, transparency, and long-term partnership. From raw material inspection to finished product testing, every batch is carefully controlled to ensure stable performance and dependable project use.

Greater Cable - Certified Quality. Reliable Supply. Engineering Value.

15K

Finished Projects

150+

professional staff

15K

happy clients

92+

awards & certifacates

PLANT EQUIPMENT

GLOBAL CERTIFICATIONS

gray UL listed building wire

CUSTOMER PHOTOS

gray 600V building wire

INTERNATIONL TRANSPORTATION

Sea Freight

We offer reliable sea freight solutions for large-volume orders. Your goods are securely packed and shipped in containers, ensuring cost-effective delivery to ports worldwide.

Air Freight

For faster delivery, our air freight service ensures your products reach international destinations quickly, with careful handling and full tracking along the way.

International Express

Need urgent shipments? Our international express service delivers small to medium orders efficiently, providing door-to-door service with real-time tracking for peace of mind.

COOPERATIVE PARTNER

We are looking for a cooperative partner to expand our business.

How To Cooperate With Us?

Simply share your requirements, receive our professional solution, confirm samples, and enjoy fast, reliable production and worldwide delivery - working with us is that easy.

Our address

Building 2, No. 40 Luxi 2nd Road, Liaobu Town, Dongguan City, Guangdong Province, China

Phone Number

+86 136 6257 9592

+86 135 1078 4550

E-mail

manager01@greaterwire.com

FAQ

Why does insulation thickness matter?

Insulation thickness is part of the product construction and affects electrical, mechanical and dimensional performance. It should meet the applicable standard for the specific conductor size. Buyers evaluating THHN insulation thickness can work with GERITEL WIRE on document review, sample confirmation, project quantities and repeat-order consistency.

Why does overall diameter matter?

Finished outside diameter affects raceway fill, pulling behavior, reel capacity and termination planning, so project buyers often request OD data for each size. GERITEL WIRE can quote THHN wire outside diameter based on the actual project BOM rather than relying on a generic product name, helping reduce specification mismatches.

Can THHN/THWN-2 be made with aluminum?

Aluminum building-wire products with THHN/THWN-2 type ratings exist, but copper and aluminum products have different conductor properties and should not be treated as interchangeable without design review. For international orders of aluminum THHN THWN-2 wire, GERITEL WIRE can coordinate technical confirmation, color and size selection, printing, packing and shipment documentation.

Is the insulation system halogen-free?

Standard PVC and nylon constructions are not normally described as low-smoke zero-halogen. If an LSZH requirement exists, a different insulation system should be specified. GERITEL WIRE can support PVC nylon copper wire distributors and contractors with product-data confirmation, OEM requirements, batch identification and export-ready packing.

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Single Conductor Building Wire THHN/THWN-2 Building Wire

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