AC90 is a flexible interlocked aluminum armoured cable approved for use in open and concealed wiring in dry locations. All AC90 is CSA approved and manufactured with two, three, or four copper conductors insulated with RW90 cross-linked polythylene rated at 600 volts from #14 to #2 AWG. The bonding conductor is bare copper. AC90 is a cost effective alternative to conduit wiring.