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  • Triplex Aluminum Cable Type URD

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    The Triplex Aluminum Cable URD cable consists of three individual conductors concentrically assembled together.  The conductors can be laid parallel to one another if so specified.  The cable comes with 2 phase conductors and one neutral conductor.  The conductors are all insulated in a black polyethylene jacket and the neutral messenger is marked with a yellow line for identification.  The conductors are made with 1350-H19 aluminum alloy.  This alloy is composed of at least 99.5% aluminum with added elements such as zinc, copper, and silicon.  The additional elements enhance the strength of the alloy without compromising the corrosion resistant qualities of the aluminum.  

    Triplex Aluminum Cable URD is designed for secondary distribution.  Secondary distribution occurs after the power has been received by the transformer and reduced to utilization voltage, a safe voltage for residential use.  This cable can be installed in ducts or be used in direct burial.  For installation in mild climates, standard polyethylene can tolerate temperatures up to 75°C.  For hotter, more arid regions, the cross-linked polyethylene jacket is preferred because it can handle temperatures up to 90°C.

    Code Word Phase Conductor Neutral Diameter (mils) Weight Per 1000 feet (lbs.) Allowable Ampacity
    Size (AWG) Strand-
    ing
    Insul. Thick. (mils) Size (AWG) Strand-
    ing
    Single Phase Cond. Comp-
    lete Cable
    Direct Burial In Ducts
    TRIPLEXED WITH YELLOW EXTRUDED STRIPE NEUTRAL
    Erskine 6 7 60 6 7 298 644 134 95 70
    Vassar 4 7 60 4 7 345 745 191 125 90
    Stephens 2 7 60 4 7 403 870 249 165 120
    Ramapo 2 7 60 2 7 403 870 278 165 120
    Brenau 1/0 9 80 2 7 512 1106 387 215 160
    Bergen 1/0 9 80 1/0 9 512 1106 441 215 160
    Converse 2/0 11 80 1 9 555 1199 478 245 180
    Hunter 2/0 11 80 2/0 11 555 1199 535 245 180
    Hollins 3/0 17 80 1/0 9 603 1302 581 280 205
    Rockland 3/0 17 80 3/0 17 603 1302 651 280 205
    Sweetbriar 4/0 18 80 2/0 11 658 1421 709 315 240
    Monmouth 4/0 18 80 4/0 18 658 1421 796 315 240
    Pratt 250 26 95 3/0 17 732 1581 853 345 265
    Wesleyan 350 37 95 4/0 18 831 1795 1118 415 320
    Holyoke 500 37 95 300 37 980 2117 1545 495 395
    Rider 500 37 95 350 37 980 2117 1598 495 395
    Fairfield 750 61 95 500 61 980 2317 1646 550 450

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