Southwire NMWU underground electrical cable is manufactured using annealed (soft) copper conductors. Compressed stranding for the stranded conductors., A PVC insulation and a nylon jacket for the phase conductors. Sunlight-, moisture-, and fungus-resistant, Minimum recommended installation temperature is minus 40°C for two-conductor cables sizes 14 AWG through 6 AWG, and minus 25°C for all other sizes. For three-conductor cables the minimum recommended installation temperature is minus 10°C., Material should be properly stored above 0°C for 24 hours prior to installation., Maximum voltage rating for all intended applications is 300V., Consult the most recent Canadian Electrical Code (CEC) or a licensed electrician for further information related to applications.