Complex sentence: While the composite core is nonconductive, it is substantially lighter and stronger than steel, which allows the incorporation of 28% more aluminum (using compact trapezoidal shaped strands) without any diameter or weight penalty.
Split into simpler sentences: While the composite core is nonconductive, it is substantially lighter and stronger than steel. Its lighter weight allows the incorporation of 28% more aluminum (using compact trapezoidal shaped strands) without any diameter or weight penalty.