Energy Alternatives - Your Source for Environmentally Friendly Energy

RW90, made with either copper or aluminum alloy conductor, is another wire type used for service entrances. The cross-linked polyethylene (XLPE) insulation has very good cold weather characteristics, and excellent water resistance. HOWEVER, it is poor on ultraviolet (sunlight) resistance unless made with special additives and printed ‘OUTDOOR’ on the outside of the insulation. Our Stock black RW90 #6 and larger is ‘OUTDOOR’. If it is not marked ‘OUTDOOR’ RW90 can only be used away from sunlight, or may be used outdoors if covered with tape or other sunlight protection acceptable to the local electrical inspector. Extra care is required to terminate aluminum RW90.