NUAL® Brand RWU90 High Speed (HS) XLPE, Low-Voltage Power 1000 V, CSA Type RWU90, Single Conductor, Aluminum. 8 AWG thru 2 AWG Class B compact stranded aluminum alloy (8000 Series) per ASTM B800 and ASTM B801. 1 AWG thru 350 kcmil compact stranded SIW aluminum alloy (8000 Series) per ASTM B800, ASTM B801 and ASTM B836. 400 kcmil thru 1000 kcmil Class B compact stranded aluminum alloy (8000 Series) per ASTM B800 and ASTM B801.. Flame-retardant Cross-linked Polyethylene (XLPE).. In accordance with Canadian Electrical Code (CEC), Part 1. For wiring exposed to the weather. For use in raceways (except cable trays) in dry, damp or wet locations in accordance with Canadian Electrical Code (CEC). For termination and splicing of aluminum conductors, refer to CEC Rule 12-118.