Construction
Conductor: Class A or B concentric stranded aluminum alloy 1350 per ASTM B 231. Stranded conductors are water-blocked with conductor filling compound.
Conductor Shield: Extruded thermosetting semiconducting shield which is free stripping from the conductor and bonded to the insulation.
Insulation: Extruded, Tree-Retardant Cross-linked Polyethylene (TRXLPE) as defined in ANSI/ICEA S-94-649 - 100% insulation level.
Insulation Shield: Extruded thermosetting semiconducting shield with controlled adhesion to the insulation providing the required balance between electrical integrity and ease of stripping.
Metallic Shield: Solid bare copper wires helically applied and uniformly spaced.
Water-blocking agents: Applied over the insulation shield and around the neutral wires to resist longitudinal water penetration. Longitudinal water penetration shall be tested in accordance with the latest edition of ICEA T-34-664 except that the minimum requirement is 15 psig for 1 hour.
Outer jacket: An extruded-to-fill black non-conducting cross-linked polyethylene jacket, meeting the physical requirements the tables below, when tested by the methods specified in ANSI/ICEA S-94-649. The jacket shall be free-stripping and not interfere with contact between the neutral wires and the underlying extruded insulation shield. The jacket is sunlight resistant. The jacket shall contain a print legend marking, sequential length marking and three longitudinal extruded red stripes.
Designed for 40 years of service.
Physical Properties of Extruded-to-Fill XLPE Jacket
|
|
Unaged Tensile Strength, min. (PSI) | 1500 |
Aged* Tensile Strength, min. ret. (%) | 70 |
Unaged Elongated, min. (%) | 150 |
Aged* Elongated, min. ret. (%) | 70 |
Heat Distortion 1 hr at 131 ºC, max. (%) | 30 |
Insulation Temperature Rating | |
Normal | 105º C |
Emergency* | 140º C |
Short Circuit - Shield | 250º C |
Short Circuit - Conductor | 350º C |
Conductor
|
N/A 4/0 |
Neutral
|
N/A 1/6 |
Conductor
|
N/A 0.088 |
Capacitance
|
N/A 0.053 |
8
|
N/A 25,997 |
8
|
N/A 5,538 |
16
|
N/A 18,039 |
16
|
N/A 3,843 |
24
|
N/A 14,821 |
24
|
N/A 3,157 |