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- PowerGuard® cables are intended for use in wet or dry locations for distribution of single or three phase medium-voltage power. These cables may be installed in ducts, exposed to sunlight or direct buried. Sizes 1/0 AWG and larger are approved for use in cable tray, marked “FOR CT USE”.
- Single conductor cable with filled strand aluminum conductors, true-triple extrusion, dry cured insulation system consisting of a thermosetting semiconducting conductor shield, high dielectric strength tree-retardant cross-linked polyethylene (TR-XLPE) insulation, thermosetting semiconducting insulation shield, flat copper tape, black polyvinyl chloride (PVC) jacket.
- Conductor:
- Compact concentric stranded aluminum alloy 1350. Stranded conductors are water-blocked with conductor filling compound.
- Conductor Shield:
- Extruded thermosetting semiconducting cross-linked polyethylene (XLPE) shield which is free stripping from the conductor and bonded to the insulation.
- Insulation:
- Extruded, Tree-Retardant Cross-linked Polyethylene (TR-XLPE) - 133% insulation level.
- Insulation Shield:
- Extruded thermosetting semiconducting cross-linked polyethylene (XLPE) shield with controlled adhesion to the insulation providing the required balance between electrical integrity and ease of stripping.
- Metallic Shield:
- Flat, uncoated 5 mil thick copper tape helically applied with a minimum 25% overlap.
- Outer jacket:
- A polyvinyl chloride (PVC) jacket is extruded over the copper tape shield, meeting the physical requirements of Table 1, when tested by the methods specified in ICEA S-97-682. The jacket shall be free-stripping and not interfere with the contact between the flat copper tape and the underlying extruded insulation shield. The jacket is sunlight resistant and marked. The jacket shall contain a print legend marking, sequential length (meter or feet) marking and three longitudinal extruded red stripes.
| Table 1 |
|---|
| Physical Properties of PVC Jacket |
| Unaged Tensile Strength, minimum (PSI) 1500 |
| Aged* Tensile Strength, minimum retention (%) 85 |
| Unaged Elongated, minimum (%) 100 |
| Aged* Elongated, minimum retention (%) 60 |
| Heat Distortion 1 hr at 121 ºC, maximum (%) 50 |
*Aged for 120 hrs at 100 ºC
| Temperature Rating |
|---|
| Insulated Conductor and Copper Tape Shield Temperature Ratings |
| Normal: | 105 ºC |
| Emergency*: | 140 ºC |
| Short-Circuit – Insulated Conductor: | 250 ºC |
| Short-Circuit – Copper Tape Shield: | 200 ºC |
*Operation at the emergency overload temperature shall not exceed 1500 hours cumulative during the lifetime of the cable.
| Standards |
|---|
| ASTM B400 – Compact Round Concentric-Lay-Stranded Aluminum 1350 Conductors |
| ICEA S-97-682 – Utility Shielded Power Cables Rated 5 Through 46 kV |
| ICEA T-31-610 – Test Method for Conducting Longitudinal Water Penetration Resistance Tests on Blocked Conductors |
| ICEA T-34-664 – Test Method for Conducting Longitudinal Water Penetration Resistance Tests on Longitudinal Water Blocked Cables |
| ICEA P-45-482 – Short Circuit Performance of Metallic Shields and Sheaths on Insulated Cable |
| AEIC CS8 – Extruded Dielectric, Shielded Power Cables Rated 5 Through 46 kV |
| UL 1072 – Medium-Voltage Power Cables |
- UL listed as Type MV-105 – File E476447