Many of those distribution cables come right out of stock in Southwire Master Service Centers. Fire safety and flexibility are important When power goes underground in subway tunnels, requirements become more specialized. One of the first priorities is fire safety. They re one of the few constructions to have earned UL s LS rating. Another requirement for tunnel installation is f lexibility.
Cables have to be trained into tight quarters.
EPR insulations and extra-f lexible stranding options fill the bill there. Southwire supplies both. Where trolleys and trains draw power from overhead lines, conductors become very specialized. ASTM defines a range of cross sections and sizes to meet mechanical and electrical needs. Southwire is a leading producer of overhead trolley wire in a variety of alloys and configurations.