Insulation
Okoguard is Okonite’s registered trade name for its exclusive ethylene-propylene rubber (EPR) based, thermosetting compound, whose optimum balance of electrical and physical properties is unequaled in other solid dielectrics. Okoguard insulation, with the distinctive red color and a totally integrated EPR system, provides the optimum balance of electrical and physical properties for long, problem free service.
The triple tandem extrusion of the screens with the insulation provides optimum electrical characteristics.
Shield
A 6 mil copper longitudinal corrugated Okobon shield is applied over the extruded semiconducting insulation screen with a sealed overlap to make the cable core impervious to moisture penetration. The tape is copolymer coated to provide a bond at the overlap and to the outer jacket. This construction provides a substantially lower shield resistance compared to a tight helically ap- plied copper tape. The tape shield resistance is also extremely stable for the life of the cable.
Jacket
The Okolene® jacket on this cable is a polyethylene compound which is mechanically rugged; oil and moisture resistant. The outer jacket is firmly bonded to the corrugated copper shield for a moisture barrier.
Applications
Okoguard shielded Okobon Type MV-90 power cables are recommended for use by electric utilities and industrial operations for distribution circuits, and for feeders or branch circuits in industrial and commercial installations.
Type MV cables may be installed in wet or dry locations, indoors or outdoors (exposed to sunlight), in underground duct, directly buried if installed in a system with a grounding conductor in close proximity that conforms with NEC Section 250.4(A)(5), or messenger supported in industrial establishments and electric utilities.
Okoguard-Okobon is especially suited for underground applications in duct or direct burial where it is subject to excessive water
Specifications
Conductor: Annealed uncoated copper compact stranded per ASTM B-496
Strand Screen: Extruded EPR semiconducting strand screen. Meets or exceeds electrical and physical requirements of ICEA S-93-639/NEMA WC74 & S-97-682, AEIC CS8, CSA C68.3 and UL 1072.
Insulation: Meets or exceeds electrical and physical requirements of ICEA S-93-639/NEMA WC74 & S-97-682, AEIC CS8, CSA C68.3 and UL 1072.
Insulation Screen: Extruded EPR semiconducting insulation screen applied directly over the insulation. Meets or exceeds electrical and physical requirements of ICEA S-93-639/NEMA WC74 & S-97-682, AEIC CS8, CSA C68.3 and UL 1072.
Shield: 6 mil longitudinal corrugated, co-polymer coated copper shield with a 0.25" overlap.
Jacket: Meets or exceeds electrical and physical requirements of ICEA S-93-639/NEMA WC74 & S-97-682 and UL 1072 for polyethylene jackets.
UL Listed as Type MV-90, sunlight resistant in accordance with UL 1072.
Cables listed to CSA C68-3 and labeled as FT4, -25°C are available on special orders.
Okoguard-Okobon cables are also available with 5, 25, 35 and 69kV ratings.
Product Features
- Triple tandem extruded, all EPR system
- Okoguard cables meet or exceed all recognized industry standards (UL, CSA,AEIC, NEMA/ICEA, IEEE, CSA).
- 105°C continuous operating temperature.
- 140°C emergency rating.
- 250°C short circuit rating.
- Passes UL and IEEE 383 and 1202 (1/0 AWG and larger) Vertical Tray Flame Test.
- Excellent corona resistance.
- Screens are clean stripping.
- Exceptional resistance to “treeingâ€.
- Exceptional resistance to moisture.
- Resistant to most oils, acids, and alkalies.
- Sunlight resistant.
- Improved Temperature Rating.
*Data provided on this page is subject to change based on different manufacturers' variances
** Images are for display purposes only refer to Product Technical Details for accurate information on the product.
