Plenum Data Cable

A communication cable comprising:

• a jacket defining an interior space that extends lengthwise about a longitudinal axis of the communication cable;
• a first plurality of electrical signal conductors that are disposed in the interior space and individually covered with first insulation comprising fluorine, wherein the first plurality of electrical signal conductors are twisted together;
• and
• a second plurality of electrical signal conductors that are disposed in the interior space and that are individually covered with second insulation comprising polyethylene covered with polyvinyl chloride, wherein the second plurality of electrical signal conductors are twisted together.

A communication cable comprising:

• a first twisted pair comprising:
• a first signal conductor comprising a first metal wire covered with first insulation;
• and
• a second signal conductor comprising a second metal wire covered with second insulation,
• wherein the first insulation comprises a first polymer that is covered with a fire barrier, the fire barrier partially disposed between the first metal wire and the second metal wire;
• a second twisted pair comprising:
• a third signal conductor comprising a third metal wire covered with third insulation;
• and
• a fourth signal conductor comprising a fourth metal wire covered with fourth insulation,
• wherein the third insulation has a better fire rating than the first polymer;
• and
• a jacket covering the first twisted pair and the second twisted pair,