300 MCM THHN/THWN-2 Aluminum Cable PVC Insulation NYLON Jacket 600V

300 MCM THHN THWN-2 Aluminum Cable PVC Insulation Nylon Jacket 600V

Allowable Ampacity for 300 MCM THHN/THWN-2 Aluminum Cable PVC Insulation Nylon Jacket 600V at 90°C: 255 Amps

Overview:

This 300 MCM THHN/THWN-2 aluminum cable is designed for high-capacity power distribution in both wet and dry environments. It features a durable PVC insulation and a clear nylon jacket that provides extra resistance to abrasion, sunlight, and moisture. Rated for 600 volts and up to 255 amps at 90°C, this cable is installed in conduit or raceway and is ideal for large-scale residential, commercial, and industrial wiring systems.

Also Known As:

300 thhn cable, 300 thwn cable, 300 mcm thhn cable, 300 mcm thwn cable, 300 thhn aluminum, 300 pvc insulated, 300 pvc insulated wire, 300 pvc insulated aluminium wire, 300 pvc sheathed cable, 300 pvc flexible cable, 300 mcm aluminum wire, 300 kcmil thhn wire, 600v 300 mcm aluminum wire

Why Choose 300 MCM THHN/THWN-2 Aluminum Wire?

300 MCM aluminum THHN/THWN-2 wire is a practical and cost-effective option for 255-amp circuits. It meets NEC requirements, weighs less than copper, and offers excellent performance for long conduit runs, feeders, and service entrance applications.

Applications:

This 300 MCM aluminum THHN/THWN-2 wire supports up to 255 amps at 90°C, making it suitable for:

• Service entrance and main feeder circuits

• Large subpanels and distribution equipment

• Conduit and raceway installations in wet or dry environments

• Commercial and industrial power distribution

• High-load HVAC, motor, and machinery systems

Standards:

• UL standard 83, 1685, CUL

• CSA C22.2 No. 75

• 1/0 & larger are rated for CT use

• Requirements of the National Electrical Code

• NEMA WC-70 construction requirements

• ASTM standards B 800, B 801, B836

• Federal Specification AA-59544

• Sunlight resistant

• RoHS Compliant

Construction

Conductors:

THHN / THWN-2 / T90 conductor is a soft drawn bare 8000 series aluminum, with Class B stranding per ASTM. Stranded conductors reduce power loss and are also easier to use in applications where flexibility is vital. 

Insulation:

THHN / THWN-2 / T90 has abrasion, heat, moisture, oil, and acid alkaline resistant polyvinyl chloride (PVC) insulation.

Jacket:

THHN / THWN-2 / T90 cables have a clear abrasion, heat, sunlight, moisture resistant, and low coefficient of friction nylon jacket. Standard stock colors include: black, red, blue, white, brown, orange, yellow, gray, purple, and green.

Specifications:

• Size AWG: 300

• Stranding: 35

• Conductor Diameter Inches: 0.571

• Insulation Thickness Inches: 0.65

• Jacket Thickness Inches: 0.008

• O.D. Inches:  0.706

• New Weight lb/1000FT: 359 lbs

• Ampacity at 90°C: 255 Amps