266.8 MCM Partridge ACSS TW Aluminum Conductor Steel Supported Trapezoidal Wire

266.8 MCM Partridge ACSS TW Aluminum Conductor Steel Supported Trapezoidal Wire

Applications:

Southwire's ACSS/TW is designed for overhead distribution and transmission lines. It is designed to operate continuously at elevated temperatures up to 250°C without loss of strength, it sags less under emergency electrical loadings than ACSR/TW, excellent self-damping properties, and its final sags are not affected by long-term creep of aluminum.
Southwire's ACSS/TW is available in equal area and equal diameter design. The equal area design allows equal ampacity in a smaller diameter conductor when compared with a standard ACSS conductor. The equal diameter design allows more ampacity in an equal diameter conductor when compared with a standard ACSS conductor. ACSS/TW also provides many design opportunities for new line construction: i.e., reduced tower cost, decreased sag, increased self-damping properties, increased operating temperature and improved corrosion resistance.

Also Known As:

266.8 MCM ACSS TW conductor, Trapezoidal wire conductor, ACSS TW aluminum conductor, Steel supported ACSS TW, 266.8 MCM ACSS TW overhead transmission, Trapezoidal wire conductor ASTM B857, 266.8 MCM ACSS TW conductor ampacity, High temperature transmission wire, 266.8 MCM ACSS TW conductor resistance. 

Standards:

•  B500 Metallic Coated Stranded Steel Core for Aluminum Conductors, Steel Reinforced.
• B609 Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes.
• B802 Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Aluminum Conductors, Steel Reinforced.
• B803 High-Strength Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Aluminum and Aluminum-Alloy Conductors, Steel Reinforced.
• B857 Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Supported (ACSS/TW).

Construction:

• ACSS is a composite concentric-lay-stranded conductor. Steel strands form the central core of the conductor with one or more layers of 63% minimum average conductivity aluminum 1350-0 wire stranded around it. The steel core carries most or all of the mechanical load of the conductor due to the "0" (fully annealed or soft) temper aluminum.
• Steel core wires are protected from corrosion by Galfan , zinc-5% aluminum-mischmetal alloy coating. High strength steel core, aluminized, and aluminum clad steel core is also available.

Specifications:

• Size: 266.8 MCM
• Type: 16
• Cross Sectional Area (in2) Alum: 0.2094
• Cross Sectional Area (in2) Total : 0.2435
• Stranding Aluminum No. Al Layers: 2
• Stranding Steel No. of Wires: 14
• Stranding No. & Diameter Individual Steel Wire: 7 x 0.0788
• Diameter (in) Steel Core: 0.2364
• Diameter (in) Complete Cable: 0.595
• Weight (lb/1000 ft) Alum: 250.5
• Weight (lb/1000 ft) Steel: 115.6
• Weight (lb/1000 ft) Total: 366.1
• Rated Breaking Strength (lb)Standard Strength: 8,880
• Resistance (Ω/ DC @ 20°C: 0.3262
• Resistance (Ω/ AC @ 75°C: 0.4009
• Ampacity (AMP)+ @ 75°C:  454