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  • Seacoast 20 AWG Types T/NT, T/NTA, T/NTB Signal Cable Individually Shielded Twisted Pair 600 Volt

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    A marine signal cable made of bare copper wire. The bare copper cable allows for excellent conductivity. By bare, it does not mean the cable is not tinned. It goes through the tinning process on that the layer is so light to alter the electrical as well as the thermal properties of the copper material. Bare copper conductors are relatively cheaper and considered better conductors in relation to tinned copper cables. However, you may want to use bare copper conductors in specific installations especially where the temperatures are not so high.

    Applications
    • The cables are designed for use in marine environments including marine vessels, off shore drilling rigs, floating offshore facilities, and in fixed offshore and onshore facilities.
    • You may use these cables for signal transmission installations in marine environments. The cables have twisted conductors and are ideal where shielding is required to offer protection against electromagnetic and electrostatic interferences. Some of the typical applications include CO2 systems, fire detectors, communication systems, gas detectors, smoke detectors, and tank level indicators.

    Insulation and jacket
    • PVC
    • Polyvinyl chloride, the commonest thermoplastic insulator is used to protect the conductor. It resists fire, flame, sunlight, oils, and chemicals. It is also resistant to abrasion.

    Sheathing
    • Nylon
    • In addition to the insulation, a sheathing material made of nylon is used to provide more protection from chemical damage and physical impact.

    Armor
    • Bronze or aluminum armor
    • The armor materials provide protection against crush, cold bend, and cold impact.

    Features
    • Type T/N (PVC) insulation
    • Stranded #20 AWG 7 bare copper
    • .015 nominal wall
    • Stranded drain wire
    • Nylon sheath
    • Polyester/aluminum foil tape shield
    • Flame retardant – meets IEEE 1202/UL-2085 flame test requirements
    • Type TP20(IS)T/NTB with bronze armor
    • Type TP20(IS)T/NTA with aluminum armor

    awg number
    of pairs
    cable
    nominal*
    o.d.
    (inches)
    cable approx.weight
    per 1000 feet
    un-armored aluminum
    20 1 .231 28.6 41.9
    20 2 .370 61.0 80.5
    20 3 .382 63.8 83.9
    20 4 .417 78.3 100.1
    20 5 .435 92.3 114.9
    20 6 .443 103.5 126.6
    20 7 .491 120.6 146.0
    20 8 .558 152.0 180.7
    20 9 .584 166.9 196.7
    20 10 .609 181.3 212.5
    20 11 .631 195.5 227.8
    20 12 .653 207.0 240.4
    20 13 .676 221.2 255.7
    20 14 .695 237.7 273.1
    20 15 .715 251.5 287.9
    20 16 .735 265.8 303.2
    20 17 .753 279.4 317.7
    20 18 .771 293.2 332.4
    20 19 .788 306.7 346.7
    20 20 .805 319.9 360.7
    20 21 .864 366.4 410.1
    20 22 .880 380.9 425.4

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