19-Wire Combination Unilay
Combination Unilay Conductors are 19 strand constructions with a straight central wire, an inner layer of six wires of the same diameter as the central wire, and an outer layer consisting of six wires of the same diameter as the central wire alternated with six smaller wires. The smaller wires have a diameter of .732 times the diameter of the central wire. The 12 wires in the outer layer and the six wires of the inner layer all have the same length of lay and direction of lay.