When you need to run building wire, the Southwire 11587301 Building Wire is a dependable option. It is UL listed and CSA approved for both indoor and outdoor use. This 12 AWG building wire has a voltage rating of 600V AC. The black nylon jacket makes it suitable for both indoor and outdoor applications. Its 500 ft length gives you plenty of wire to work with in your projects. You can easily make connections using this THHN solid conductor building wire that comes in black color. When it comes to running building wire, choose the Southwire 11587301 Building Wire.