Pinnacle Series™ Spool and Guy Strain Insulators

Spool insulators are typically used for ground wires or cable tension support for other cables, for example, cable or network cable.

Guy-strain insulators are installed in guy wires to ensure the wire does not provide a path to ground.

Technical Specifications

  • Finish: ANSI Grey 70 porcelain glaze
  • Voltage Class: Distribution Class
  • Transverse Strength: Up to 6000 lbs.
  • Tensile Strength: Up to 20,000 lbs.
  • Frequency: 50/60 Hz


Peak Demand’s Pinnacle Series porcelain insulators are manufactured using a wet porcelain process and cured in an environmentally controlled production facility to ensure a complete and even cure of the porcelain while also resulting in the highest quality surface finish.