At Sky High Supply, we carry both THHN (Thermoplastic High Heat Nylon-coated) wire and Southwire TelcoFlex® L4 cables, giving field pros the flexibility and durability they need for nearly any power distribution setup.

THHN wire is a trusted standard for general-purpose building wiring — ideal for conduit runs, control panels, and circuit wiring in commercial and industrial environments. It’s lightweight, versatile, and easy to pull — perfect for everyday electrical installations.

TelcoFlex® L4 cables, on the other hand, are purpose-built for telecom, CATV, and data applications. With tinned copper conductors, TelcoHyde® 5221 insulation, and UL Cable Tray (CT USE) compliance, these heavy-duty cables are trusted for central office, cell tower, and mission-critical power applications.