Okonite Paper Insulated Bronze Covered cable is recommended for use in underground ducts, direct buried and aerially when lashed to a messenger. PIBC cables are used in any circuit that requires the highest reliability, the longest uninterrupted life and where the greatest surge, impulse and AC dielectric strength are desired. Because of the unique triangular shape and nested design a 3/C PIBC cable offers the added advantage of permitting large amounts of power to be
transmitted in a small diameter cable.
Although not shown as an insulation above 600 Volts in the National Electric Code, it is readily approved by local inspectors because of its extensive safe use by utilities. Therefore, PIBC cables can be used in industrial or commercial applications with prior notification to and approval by the local inspector.
Also available in other voltage ratings and as a single conductor cable.
Okonite's impregnated paper insulation consists of the finest electrical grade paper made from coniferous wood pulp and the purest grade polybutene dielectric fluid. The paper is manufactured to Okonite's specifications to produce the necessary mechanical and physical properties to resist tearing and wrinkling during manufacture and subsequent handling during installation conditions; and in addition, to assure properties of low dielectric loss with high dielectric strength. Okonite pretwists the sectors of 3/C cables before taping to virtually eliminate wrinkles at the cabling machine. To maintain a smooth, wrinkle-free precisely gapped tape insulation, Okonite carefully slits its own taping pads into widths tailored for each conductor size and wall thickness. Most important, Okonite has the latest taping machines with the most precise tape tension controls available today.
The impregnating fluids used are of medium viscosity (high viscosity optional) polybutene types, also manufactured to Okonite specifications. Polybutene dielectric fluids are better than natural petroleum based insulating fluids because they resist aging, have lower and more stable power factor values and possess an inherent tackiness which resists draining out of the paper tapes. Okonite's impregnation facilities clay-filter and degas the dielectric fluids to provide low power factors and stableionization levels from voltage stress.
Sheath & Jacket
Okonite's inner jacket is a ThermoPlastic Rubber (TPR) that provides mechanical protection for the insulation and encapsulates the impregnant. The metallic sheath is comprised of commercial bronze sheet that is folded around the cable core, TIG welded and then corrugated. This Continuous Lightweight eXterior (C-L-X) provides an impervious barrier protecting the cable core from the environment. The bronze C-L-X hasan inherently high fault current carrying capacity, typically eliminating the need for a separate ground wire. Okonite's TPR outer jacket provides mechanical and corrosion protection for the bronze sheath. The TPR material resists most chemicals, is more flexible than polyethylene and has a low coefficient of friction which when coupled with the lighter weight of a lead free cable greatly reduces pulling tension
Okonite PIBC cable cores are manufactured in accordance with and meet the requirements of AEIC CS1-90 11th Edition. The inner jacket, the bronze C-L-X and the outer jacket are manufactured to an Okonite Product Line Specification
- Pre-twisted conductors.
- Polybutene impregnating fluid.
- 90°C continuous operating temperature.
- 110°C emergency rating.
- 200°C short circuit rating.
- High impulse strength.
- The core has a proven service life of
- over 40 years.
- Impervious to the environment.
- Contains no lead.
- Lighter in weight than PILC cable