Structured Copper Cabling consists of cables such as Category 3, 5e, 6, 6a, and now even category 7. These cables consist of groups of twisted pairs of copper wires that utilize electrical current to transport information. As the category of the cable increases, as does the bandwidth and number of twisted pairs. For example, category 7 cabling is able to transport much more data at larger bandwidths than the limited category 3 cable. Copper is continuing to advance and offer better data transport, but it does have some limitations. For more information, reference Bicsi. Bicsi outlines current industry standards for cabling installation for both copper and fiber optic cabling.