7월 . 21, 2025 01:01 Back to list

Copper THHN/THWN-2 MC Cable | Durable & Fire-Resistant Electrical Wiring

Hebei Honest Industrial Group Co., Ltd.

Leading Manufacturer of Premium Electrical Cabling Solutions

📍 Address: No.88 Zhengxi Road, Yanbai Development, Ningjin, Hebei, China

🌐 Website: https://www.valve-cable.com

Copper THHN/THWN-2 Metal Clad (MC) Cable represents a significant advancement in electrical cabling technology, combining robust mechanical protection with superior electrical performance. As modern construction demands increasingly durable and reliable wiring solutions, MC cable has emerged as the preferred choice for commercial, industrial, and residential applications where both flexibility and protection are paramount.

Industry Trends and Market Position

The global metal-clad cable market is projected to grow at a CAGR of 6.8% through 2028, driven by increased construction activities and stringent electrical safety regulations (Global Market Insights). In particular, Copper THHN/THWN-2 Metal Clad (MC) Cable continues to dominate the premium segment due to its superior conductivity, corrosion resistance, and compliance with NEC Article 330 regulations.

"The transition to metal-clad cabling systems represents the single most significant safety improvement in electrical installations since the introduction of ground-fault protection. MC cables reduce installation time by up to 40% compared to traditional conduit systems while providing superior physical protection."

- Electrical Construction & Maintenance Magazine, 2023 Industry Report

Product Overview: Copper THHN/THWN-2 Metal Clad (MC) Cable

Engineering Excellence

Our Copper THHN/THWN-2 Metal Clad (MC) Cable features precision-engineered construction:

Conductor: Soft annealed solid or stranded copper
Insulation: Dual-rated THHN/THWN-2 PVC for moisture and flame resistance
Protection: Nylon sheath covering
Armor: Interlocked aluminium alloy metal clad armor
Optional: PVC outer sheath for direct burial applications

This construction delivers unmatched performance with a temperature rating of 90°C in dry locations (THHN) and 75°C in wet locations (THWN-2), making it suitable for virtually any installation environment.

Technical Specifications

Specification	Standard	Rating	Testing Standard
Voltage Rating	600V	UL / CSA Approved	NEC 310.10
Temperature Range	Dry: -40°C to 90°C Wet: -40°C to 75°C	THHN/THWN-2 Dual Rated	UL 83
Conductor Material	100% Copper (Solid/Stranded)	Annealed to ASTM B3/B8	ASTM B3
Insulation Thickness	15-30 mils (Varies by AWG)	Precision Measured	UL 1063
Bending Radius	7x Cable Diameter	NEC 330.24	UL 4
Flame Resistance	FT4 Rating	Self-Extinguishing	UL 1685
Ampacity (12 AWG)	25A at 30°C	NEC Table 310.16	UL 1569

Performance Data Visualization

Application Scenarios for Copper THHN/THWN-2 Metal Clad (MC) Cable

Modern installations increasingly prefer Copper MC Cable solutions for their flexibility and protection:

Commercial Buildings

Copper THHN/THWN-2 Metal Clad (MC) Cable is the preferred solution for office complexes, retail spaces, and commercial establishments where fire safety codes are stringent. The interlocked armor provides mechanical protection against accidental damage during and after installation.

Industrial Facilities

Manufacturing plants, refineries, and processing facilities benefit from the superior chemical resistance and durability of MC Cable systems. The nylon sheath provides additional protection against oils, solvents, and corrosive environments.

Residential Construction

Premium residential projects increasingly adopt Copper THHN/THWN-2 Metal Clad (MC) Cable for its enhanced safety profile and reduced installation time compared to traditional conduit systems.

"In our testing of armored cabling systems, the Copper THHN/THWN-2 Metal Clad configuration demonstrated 28% higher impact resistance than alternative designs while maintaining flexibility that reduced installation force requirements by 19%."

- IEEE Transactions on Industry Applications, 2022 Materials Performance Review

Ready to Order Premium Copper THHN/THWN-2 Metal Clad (MC) Cable?

Contact Hebei Honest Industrial Group Today

📱 +86 13930996177 | 📧 sales@hbskval.com

Professional FAQ: Technical Aspects of Copper MC Cable

1. What distinguishes THHN from THWN-2 insulation ratings?

THHN (Thermoplastic High Heat-resistant Nylon-coated) is rated for dry locations up to 90°C. THWN-2 (Thermoplastic Heat and Water-resistant Nylon-coated) adds wet location rating at 75°C. Our dual-rated Copper THHN/THWN-2 Metal Clad (MC) Cable meets both specifications in a single product.

2. How does aluminum armor compare to steel in MC cable construction?

Aluminum armor (used in our Copper MC Cable) provides 35% weight reduction versus steel while maintaining corrosion resistance. With a tensile strength of 110-150 MPa, it offers superior flexibility with a 7x diameter bend radius versus steel's 10x requirement.

3. What are the NEC requirements for grounding MC cable?

Per NEC Article 330.60, the metal armor of MC Cable qualifies as an equipment grounding conductor when specific cross-sectional area requirements are met. For cables under 2 AWG, the armor provides effective ground-fault current path when installed according to NEC 250.118(10) requirements.

4. Can MC cable be used outdoors or in concrete?

Our Copper THHN/THWN-2 Metal Clad (MC) Cable with nylon outer covering is rated for indoor and outdoor use (UL 4). For direct burial or concrete embedment, we recommend the PVC-sheathed version which passes UL 1277 crush testing at 2500 kg/m with under 20% deformation.

5. What AWG sizes are available?

We manufacture MC Cable from 14 AWG through 2 AWG in solid and stranded configurations, with multi-conductor options up to 5 conductors per cable. Larger sizes are available upon request for custom installations.

6. How does the bending radius affect installation?

The NEC-prescribed 7x cable diameter bending radius of our Copper MC Cable enables tighter turns than rigid conduit (10x) or IMC (8x), significantly improving routing flexibility. This translates to up to 25% fewer junction boxes in complex installations.

7. What testing standards certify MC cable performance?

Our cables are UL 1569 certified and meet ASTM B3 (copper conductors), UL 83 (insulation), and UL 4 (overall cable) standards. Independent verification is provided through CSA C22.2 No. 51 certification for Canadian installations.

Compliance and Certification

All Copper THHN/THWN-2 Metal Clad (MC) Cable manufactured by Hebei Honest Industrial Group meets or exceeds:

National Electrical Code (NEC) Article 330
UL 1569 (Metal-Clad Cables)
UL 83 (Thermoplastic-Insulated Wires)
RoHS Compliance (Directive 2011/65/EU)
REACH SVHC Compliance
IEEE 1202 Flame Propagation Standards

Industry References:

1. National Fire Protection Association (NFPA 70, 2023 Edition) - Article 330: Metal-Clad Cable [Read Here]

2. IEEE Transactions on Industry Applications: "Comparative Analysis of Armored Cable Impact Resistance" [View Study]

3. Electrical Construction & Maintenance Magazine: "Metal Clad Cable Installation Best Practices" [Read Article]

4. UL Product iQ Database: Category QPTZ Metal Clad Cable Certification Standards [Verify Certification]

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