SPEC 48302

Bronze and Alloy, Grooved Contact Wire

CuMg 0.2 (Alloy80)/CuMg 0.5 (Alloy 55) Contact CuMg0.2 and CuSn0.2/ Trolley Wire



This product combines excellent wear characteristics, and high-tensile strength properties. Contact/ Trolley wire is available in a choice of two alloys to provide the best match of electrical and mechanical wear properties for each application - 55 percent and 80 percent conductivity IACS (CA165 and A162), and is offered in both ASTM and EN/IEC configurations: round (upon request), grooved, figure 8, or figure 9.

Applications and Features:

For use as overhead power source on streetcars, trolleys, electric trolley buses, light rail and heavy mass transit systems. Also used on electrically powered mine train, and industrial cranes. High-tensile strength properties allow for reduced clearance maintenance in tunnel applications. Southwire bronze contact/trolley wire is ideal for transportation systems with increased line speeds just over 200 mph (322 km/h).

• High Tensile Strength and Breaking Load
• Highest Half-Hard Value of any Materials in Present Day Use.
• Durable and Reliable Support.
• Allows for Increase in Max Line Speeds
• Mechanically Rugged
• RoHS/Proposition 65 Compliant
• Ships on N-42 wooden reels (S-77 steel reels available per SW reel policy)
• Available with top lobe identification marking per IEEE 1896-2016
• Southwire SPEED Qualified for low volume requests
• Buy America Compliant


  • ASTM B9 Bronze Trolley Wire
  • EN 50149 Railway Applications. Fixed Installations. Electric Traction. Copper and Copper Alloy Grooved Contact Wires.
  • Table 1 – Weights and Measurements
    Stock NumberCond. ShapeCond. MetalAlloyCond. SizeCond. AreaApprox. ODApprox. WeightDC Resistance @ 20°CRated Strength
    677939Figure-9CuMg0.5553353364000.680 x 0.48210200.0560516285
    647193Figure-9CuMg0.2803353364000.680 x 0.48210200.0385415040
    All dimensions are nominal and subject to normal manufacturing tolerances
    1. These numbers represent the minimum percent IACS conductivity of the alloys. Other alloys are available subject to special inquiry.
    2. Bronze trolley wire is normally manufactured from alloys 55 or 80
    3. Figure 9 wire, dimensions given are nominal height of entire section and width of lower lobe.
    4. Tolerances: The above data are approximately and subject to normal manufacturing tolerances Weights, breaking strengths and resistance are base on nominal dimensions
    * units in mm²

    Contact Wire

    Copper-Tin Alloy
    One Groove
    Copper-Silver Alloy
    Two Groove
    Copper-Magnesium Alloy
    Three Groove
    One GrooveTwo GrooveThree Groove

    Revision: 1.000.005

    Updated On: July 3, 2024, 9:53 p.m. UTC