... concrete, asphalt, and under pave ·Single point connection ·Twin conductor cable ·Silent, efficient, and safe ·Emits zero EMF (electromagnetic fields) ... installation ·Durable construction ·15-year limited warranty against manufacturing defects Cable Construction: Twin conductor Rated Voltage: 208V,240V,277V,347V, ... Temp.: 40°F(5°C) Cold lead 20ft (6m) length self-regulating heating cable in winter