SPEC 84025

3-Layer 25kV AAAC Tree Wire/Spacer Cable

An Alternative and Robust Design to Bare AAAC Conductors to Harden the Electrical Grids.
3-Layer 25kV AAAC Tree Wire Concentrically Stranded AAAC Track-Resistant Crosslinked Polyethylene.



  1. Conductor:Aluminum-alloy 6201-T81 wires, concentrically stranded
  2. Strand Shield:Semi-conducting cross linked polymer
  3. Inner Layer:Low-Density Crosslinked Polyethylene (LDXLPE)
  4. Outer Layer:High-Density Track-Resistant Crosslinked Polyethylene

Applications and Features:

Used for primary and secondary overhead distribution where limited space is available or desired for rights-of-way. Installed the same as bare conductors, however, covering is effective in preventing direct shorts and instantaneous flashovers should tree limbs or other objects contact conductors in such close proximity.
  • Tree Wire - Used for spans where trees crowd the right-of-way, such as in wooded residential areas, when a minimum of interference with the environment is desired. Covering minimizes power outages due to conductor contact with tree limbs, reducing the need for frequent or severe trimming.
  • Covered Aerial MV Cable (CAMV)/Spacer Cable - Installed with other Covered Aerial MV cables and a supporting messenger through a series of space-maintaining devices (spacers). The resulting close-proximity configuration minimizes the amount of space and hardware required for line installation, particularly useful in congested areas.
  • Covering Rated 90°C Normal and 130°C Emergency Operation. Unless adequate knowledge of the thermal characteristics of the environment is known, the permissible conductor temperature should be reduced by 10°C or in accordance with available data.
  • Specifications:

  • ASTM B398 Standard Specification for Aluminum-Alloy 6201-T81 and 6201-T83 Wire for Electrical Purposes
  • ASTM B400 Standard Specification for Compact Round Concentric-Lay-Stranded, Aluminum 1350 Conductors
  • ICEA S-121-733 Tree Wire and Messenger Supported Spacer Cable
  • Table 1 – Weights and Measurements
    Cond. SizeCond. StrandsDiameter Over ConductorConductor Shield ThicknessInner Layer ThicknessOuter Layer ThicknessApprox. ODApprox. WeightRated Strength
    All dimensions are nominal and subject to normal manufacturing tolerances

    Revision: 1.000.001

    Updated On: July 3, 2024, 10:14 p.m. UTC