1590-45/7 ACSS/MA2/63% LAPWING 7900 FT

Southwire #: 61143917

ACSS is used 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 than a comparable ACSR under electrical loadings it is self-damping if prestretched during installation and its final sags are not affected by long term creep of aluminum. The advantages make ACSS especially useful in reconductoring applications requiring increased current with existing tensions and clearances, new line applications where structures can be economized because of reduced conductor sag, new line applications requiring high emergency loadings, and lines where aeolian vibration is a problem.

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ACSS-Aluminum Conductor, Steel Supported


Stock # 61143917 61143917
Size (AWG or kcmil) (mm2) 1590 KCMIL 1590 KCMIL
No. of Strands 45 45
Nom. OD (mils) (mm) 1503 38.20 mils mm
Nominal Total Weight (lbs/1000') (kgs/km) 1790 2664 lbs/1000' kgs/km

Standards & References

Southwire’s ACSS conductor meets or exceeds the following ASTM specifications:

  • B500 Metallic Coated Stranded Steel Core for Use in Overhead Electrical Conductors.
  • 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 (ACSR).
  • B803 High-Strength Zinc-5% Aluminum Mischmetal Alloy-Coated Steel Core Wire for Use in Overhead Electrical Conductors.
  • B856 Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Supported (ACSS).
  • B958 Extra-High-Strength and Ultra-High-Strength Class A Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in Overhead Electrical Conductors.


ACSS is a composite concentric-lay stranded conductor. Steel strands form the central core of the conductor with two or more layers of aluminum 1350-O wire stranded around it. The steel core carries most or all of the mechanical load of the conductor due to the “O” temper (fully annealed or soft) aluminum. Steel core wires are protected from corrosion by a zinc-5% aluminum-mischmetal alloy coating. For aluminum-clad (AW) ACSS, please refer to the ACSS/AW catalog sheet. Corrosion protection should be selected to suit the environment to which the conductor will be exposed.