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    Thhw Al Aluminum Wire Cable 4 6 1/0 2/0 4/0 AWG 350mcm 600V with PVC Insulation

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    2025-07-30 08:28:36
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Thhw Al Aluminum Wire Cable 4 6 1/0 2/0 4/0 AWG 350mcm 600V with PVC Insulation
1. Introduction
The THHW Aluminum Wire Cable series—encompassing 4 AWG, 6 AWG, 1/0 AWG, 2/0 AWG, 4/0 AWG, and 350MCM—represents a versatile solution for 600V power distribution in commercial, industrial, and institutional settings. Engineered with 1350-H19 Aluminum Conductors and PVC insulation, these single-Conductor Cables balance performance, durability, and cost efficiency, making them a staple in Building Wiring, motor connections, and control systems.
Available in a wide range of gauges, the series delivers tailored current capacities from 55A (6 AWG) to 310A (350MCM), all operating at 75°C continuous (105°C short-term). Their stranded design—featuring 7 to 61 strands—ensures Flexibility for installation in conduit, cable trays, or dry locations, while PVC insulation provides resistance to oils, water, and abrasion.
This comprehensive guide explores the cables’ engineering details, from their Aluminum Cores to their Flame-Retardant Insulation, highlighting how each component contributes to their 25-year service life. We’ll examine their compliance with UL and ASTM standards, installation methodologies, and real-world applications, demonstrating why they have become the preferred choice for contractors and engineers seeking reliable, cost-effective 600V wiring solutions.
2. Conductor Design: Stranded Aluminum Excellence
Each gauge in the THHW series features a precision-engineered Stranded Conductor:

  • 6 AWG Configuration: 7 strands of 1.6mm diameter 1350-H19 aluminum, delivering:

  • 55A continuous current at 75°C

  • 70A short-term current at 105°C

  • 900N breaking force

  • 0.3kg/m total weight (including insulation)

Ideal for branch circuits, lighting systems, and small motor connections.

  • 4 AWG Configuration: 7 strands of 2.0mm diameter 1350-H19 aluminum, providing:

  • 85A continuous current at 75°C

  • 105A short-term current at 105°C

  • 1,400N breaking force

  • 0.5kg/m total weight

Suitable for subpanel feeds, HVAC equipment, and medium-sized motor leads.

  • 1/0 AWG Configuration: 19 strands of 1.6mm diameter 1350-H19 aluminum, offering:

  • 125A continuous current at 75°C

  • 155A short-term current at 105°C

  • 2,200N breaking force

  • 1.1kg/m total weight

Perfect for larger motor circuits and commercial building distribution.

  • 2/0 AWG Configuration: 19 strands of 1.8mm diameter 1350-H19 aluminum, featuring:

  • 145A continuous current at 75°C

  • 180A short-term current at 105°C

  • 2,700N breaking force

  • 1.4kg/m total weight

Designed for heavy-duty branch circuits and industrial machinery.

  • 4/0 AWG Configuration: 19 strands of 2.1mm diameter 1350-H19 aluminum, providing:

  • 195A continuous current at 75°C

  • 240A short-term current at 105°C

  • 3,800N breaking force

  • 2.0kg/m total weight

Suitable for main feeder circuits and large motor feeds.

  • 350MCM Configuration: 61 strands of 2.2mm diameter 1350-H19 aluminum, delivering:

  • 310A continuous current at 75°C

  • 385A short-term current at 105°C

  • 6,200N breaking force

  • 3.2kg/m total weight

Ideal for heavy-load distribution in industrial facilities.
All conductors feature a concentric stranding pattern with 12× to 16× lay lengths (depending on gauge), enhancing flexibility while maintaining structural integrity during installation and thermal cycling.
3. PVC Insulation: Reliable Protection
The cables’ PVC insulation is formulated for 600V applications:

  • Material Properties: Polyvinyl chloride compound with:

  • 1.0mm thickness (6–4 AWG) to 2.2mm thickness (350MCM)

  • Flame-retardant additives meeting UL 94 V-2 rating

  • -15°C to 75°C continuous operating range

  • 105°C short-term overload capability

This formulation ensures durability across diverse environments.

  • Environmental Resistance:

  • Resistance to mineral oils, lubricants, and mild chemicals

  • Water resistance (IP66 rating when properly terminated)

  • Abrasion resistance (Taber index <40mg/1,000 cycles)

  • Fungal resistance (ASTM G21 compliant)

These properties make it suitable for industrial and commercial settings.

  • Insulation Performance:

  • Dielectric strength: 18kV/mm

  • Volume resistivity: >10¹⁴ Ω·cm

  • Insulation resistance: >100MΩ/km at 20°C

These electrical properties ensure safe operation at 600V.

  • Color Coding: Standard color options for easy identification:

  • Black (phase conductors)

  • White (neutral conductors)

  • Green (grounding conductors)

  • Red/blue/brown (identified phases)

This color coding simplifies installation and maintenance.
This PVC insulation system ensures the cables can withstand 25 years of service with minimal degradation in dry and moderately damp environments.
4. Electrical Performance: 600V Power Distribution
The cables’ electrical specifications are optimized for 600V systems:

  • Voltage Rating: 600V phase-to-phase, 347V phase-to-ground, compliant with:

  • NEC Article 310 (Conductors for General Wiring)

  • CSA C22.2 No. 21 (Thermoplastic Insulated Wires)

  • Current-Carrying Capacity:

For 6 AWG: 55A continuous at 75°C, 70A short-term at 105°C.
For 4 AWG: 85A continuous at 75°C, 105A short-term at 105°C.
For 1/0 AWG: 125A continuous at 75°C, 155A short-term at 105°C.
For 2/0 AWG: 145A continuous at 75°C, 180A short-term at 105°C.
For 4/0 AWG: 195A continuous at 75°C, 240A short-term at 105°C.
For 350MCM: 310A continuous at 75°C, 385A short-term at 105°C.
Derating factors available for ambient temperatures exceeding 30°C.

  • Voltage Drop Characteristics:

  • 6 AWG: <3% at 55A over 30-meter runs

  • 4 AWG: <3% at 85A over 40-meter runs

  • 1/0 AWG: <3% at 125A over 50-meter runs

  • 2/0 AWG: <3% at 145A over 60-meter runs

  • 4/0 AWG: <3% at 195A over 70-meter runs

  • 350MCM: <3% at 310A over 80-meter runs

These voltage drop characteristics ensure stable operation of connected equipment.

  • Short-Circuit Withstand:

  • 10kA for 5 seconds (6–4 AWG)

  • 15kA for 5 seconds (1/0–2/0 AWG)

  • 20kA for 5 seconds (4/0 AWG–350MCM)

This withstand capability provides time for protective devices to operate.
These electrical properties make the THHW series suitable for a wide range of 600V power distribution applications in commercial and industrial facilities.
5. Mechanical Properties: Durable and Flexible
The cables’ mechanical properties ensure they can withstand installation and operation:

  • Physical Dimensions:

  • Overall diameter: 5.2mm (6 AWG) to 14.8mm (350MCM)

  • Minimum bend radius: 6× OD (fixed installations), 10× OD (dynamic applications)

  • Weight: 0.3kg/m (6 AWG) to 3.2kg/m (350MCM)

These dimensions facilitate installation in various pathways.

  • Tensile Strength:

  • Conductor breaking force: 900N (6 AWG) to 6,200N (350MCM)

  • Safe pulling tension: 30% of breaking force

  • Elongation at break: >15% (conductor), >200% (insulation)

These properties enable safe installation in conduit and cable trays.

  • Impact Resistance:

  • Passes -15°C impact test (1kg weight dropped from 1m)

  • No insulation cracking or conductor damage

This ensures durability in cold environments.

  • Crush Resistance:

  • Withstands 10kN/m² pressure without performance degradation

  • Maintains electrical integrity after compression

This protects against accidental damage during installation.
These mechanical properties make the cables suitable for installation in diverse environments, from office buildings to industrial facilities.
6. Installation Methodologies: Versatile Application
The cables’ design facilitates installation in various settings:

  • Conduit Installation: Compatible with all standard conduit types:

  • EMT (Electrical Metallic Tubing)

  • PVC conduit (Schedule 40/80)

  • Rigid metal conduit

  • Intermediate metal conduit

Their smooth PVC insulation reduces pulling friction by 25% compared to rubber-Insulated Cables.

  • Cable Tray Installation: Suitable for:

  • Ladder trays

  • Solid-bottom trays

  • Wire mesh trays

  • Channel raceways

Their flame-retardant properties meet NFPA 70 requirements for cable tray installations.

  • Dry Location Installation: Approved for:

  • Indoor wiring in commercial buildings

  • Industrial facilities (non-hazardous locations)

  • Institutional buildings (schools, hospitals)

  • Data centers (non-critical circuits)

They are not recommended for wet locations without additional protection.

  • Termination Process: Compatible with:

  • Compression lugs (aluminum rated)

  • Mechanical lugs with anti-oxidant compound

  • Insulation piercing connectors for tap-offs

Termination time is reduced by 20% compared to copper due to lighter weight.

  • Special Installation Considerations:

  • Maximum pull length: 100 meters without intermediate pull points

  • Minimum bending radius: 6× OD for fixed installations

  • Temperature derating required above 30°C ambient

These guidelines ensure optimal performance and longevity.
These installation options make the THHW series a versatile solution for virtually any 600V dry-location application.
7. Standards Compliance: Industry Recognition
The cables meet rigorous industry standards:

  • UL 83: Thermoplastic-Insulated Wires and Cables, ensuring insulation performance and safety.

  • ASTM B230: Standard specification for 1350-H19 Aluminum Conductors, verifying electrical and mechanical properties.

  • UL 94: Flame-retardant properties meet V-2 rating, confirming fire safety performance.

  • NEC (NFPA 70): Recognized in Article 314 (Outlet Boxes) and 334 (Nonmetallic-Sheathed Cable).

  • CSA C22.2 No. 21: Canadian standard for thermoplastic-insulated wires, ensuring North American compatibility.

Compliance with these standards ensures the cables can be specified for projects throughout North America and globally where applicable standards are recognized.
8. Applications: Diverse 600V Solutions
The THHW series excels in various applications:

  • Commercial Buildings:

  • Office tower branch circuits

  • Retail store lighting and power

  • Restaurant kitchen equipment

  • Hotel guest room wiring

  • Hospital non-critical circuits

  • Industrial Facilities:

  • Manufacturing plant control circuits

  • Warehouse lighting and conveyor systems

  • Food processing facility non-washdown areas

  • Automotive plant auxiliary circuits

  • Pharmaceutical facility general wiring

  • Institutional Buildings:

  • School classroom wiring

  • University campus buildings

  • Government facilities

  • Library power distribution

  • Sports arena general lighting

  • Specialized Applications:

  • Data center non-critical circuits

  • Telecommunication facilities

  • Renewable energy (solar, wind) auxiliary systems

  • Agricultural buildings (dry locations)

  • Transportation hubs (airports, train stations)

In each application, the THHW series delivers reliable performance with minimal maintenance requirements across its 25-year service life.
9. Cost Efficiency: Economic Advantage
The THHW series offers exceptional value:

  • Material Costs: 40% lower than equivalent Copper Cables, with:

  • Reduced shipping costs due to lighter weight

  • Lower material usage in large-scale projects

  • Elimination of copper theft risks

These factors reduce initial project costs significantly.

  • Installation Savings:

  • 20% faster pulling due to lighter weight

  • Reduced labor requirements (2-person crew vs. 3 for copper)

  • Compatibility with standard tools, no specialized equipment needed

These factors reduce installation costs by approximately $150 per 100 meters.

  • Lifecycle Costs: 25-year service life minimizes:

  • Replacement frequency (once vs. 2–3 times for lower-grade cables)

  • Maintenance requirements (visual inspection only every 5 years)

  • Downtime costs (estimated at $500/hour for commercial facilities)

  • Total Cost of Ownership: 35% lower than copper over 25 years, considering:

  • Initial material savings

  • Reduced installation labor

  • Lower maintenance costs

  • Minimal replacement needs

These cost advantages make the THHW series particularly valuable for large-scale projects where material and installation expenses constitute a significant portion of the budget.
10. Environmental and Safety Benefits
Beyond performance, the cables deliver significant environmental and safety advantages:

  • Sustainability:

  • 100% recyclable aluminum conductor (95% energy savings vs. primary production)

  • PVC insulation recyclable through specialized processes

  • Reduced carbon footprint (2.8kg CO₂ per meter vs. 7.5kg for copper)

These factors align with green building initiatives.

  • Fire Safety:

  • UL 94 V-2 flame rating (self-extinguishing)

  • Reduced flame spread compared to non-flame-retardant cables

  • Low smoke emission during combustion

These properties enhance building safety.

  • Worker Safety:

  • Lighter weight reduces installer fatigue and injury risk

  • Smooth insulation prevents cuts during handling

  • Color-coded insulation simplifies phase identification, reducing errors

These factors create a safer work environment.

  • Occupant Safety:

  • Low toxicity emissions during combustion

  • Reliable performance in normal and emergency conditions

  • Compliance with electrical safety standards

These properties protect building occupants.
These benefits make the THHW series a responsible choice for both environmental and safety considerations.
11. Maintenance and Longevity
The cables’ design ensures minimal lifecycle maintenance:

  • Service Life: 25 years under normal conditions, with:

  • 20-year expectancy in industrial environments

  • 15-year expectancy in moderately damp locations

This longevity reduces long-term replacement costs.

  • Inspection Requirements:

  • Visual inspections every 5 years for:

  • Insulation damage

  • Proper termination integrity

  • Signs of overheating

  • Thermal imaging recommended every 10 years for critical circuits

These minimal inspections reduce maintenance costs.

  • Repair Options:

  • Damaged sections can be spliced using 600V Rated junction boxes

  • Insulation repairs with PVC tape or heat-shrink sleeves

  • Partial replacement feasible without full run removal

Repair costs 60% lower than full cable replacement.

  • End-of-Life Management:

  • Aluminum conductor retains 90% of material value for recycling

  • PVC insulation recyclable through specialized processes

  • Complies with WEEE and EPR directives for responsible disposal

This ensures environmentally responsible end-of-life handling.
This low-maintenance profile is particularly valuable for commercial and industrial facilities where maintenance budgets are constrained.


Tags associés： PVC Insulation Cable Aluminum Wire Cable 350mcm Cable
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