Optical Cable

What you should know about ADSS Cable


ADSS cables. All-Dielectric Self Supporting cables. The All-Dielectric Self Supporting (ADSS) cable is a completely non-metallic structure in which the tensile load bearing elements are integral within the circular design of the cable – usually in the form of aramid yarns or stranded glass reinfroced plastic rods.

The structure of ADSS Cable

  • Typically a loose tube cable design
  • Designs are application specific


The Applications of the ADSS Cable 
– Cable supports itself

  • No external support or messenger wire – Uses new and existing right away
  • Distribution or Transmission Lines – Designed to specific weather conditions
  • NESC Light, Medium or Heavy Load


The Advantages about the ADSS Cable

  • All-dielectric construction
  • Eliminates bonding & grounding
  • Live power line installation
  • Lower costs


Key Specifications for  ADSS Cable

  • Maximum span distance between poles, Longer spans require more cable strength
  • Installation sag: typically 1.5%. Less sag requires stronger cables
  • Line voltage: Distribution: Use HDPE jacket span / Transmission: Evaluate line voltage/spacing compatibility, HDPE or track resistant jacket
  • Maximum weather loading (wind, ice, safety factors, etc): Higher winds or thicker ice requires stronger cables / Can use location to determine loading per NESC.
  • Fiber count: Higher counts (>72) increase the cable diameter: Larger cable diameters have more weight & carry more weather loading
  • No of fibers per tube
  • Maximum sag restrictions: Any clearance considerations / Restrictions may require a stronger cable


Key Information Needed for ADSS Cable Quotation

  • Fiber Count
  • Maximum Span Distance
  • Weather Loading: NESC Light, Medium, Heavy or Other
  • Line Voltage (kV) if transmission lines are used.
    – System voltage worksheet required for > 69kV
    – Needed to consider dry band arcing and corona resistance


Key Information Needed: Assumptions can be made if not specified

  • Jacket Configuration (1 or 2): 1 likely will be assumed
  • Initial Installation Sag? 1.5% is typical


Additional information to consider

  • Number of Fibers per Tube: 12f/t recommended for distribution spans up to 144 fibers, 4f/t recommended > 144 fibers
  • Buffer tube preference for closure routing: Polypropylene < 144, PBT > 144
  • Elevation changes?
  • Vertical or horizontal sag limitations/clearance
  • Pollution level – important in high voltage applications
  • Structure type & load capability