Class 4 Copper Cable shall be UL listed and compliant with UL 1400-2 for Class 4 cabling. It shall be a component of an end-to-end Class 4 Fault Managed Power System (FMPS) that efficiently and safely carries significant power at higher voltages over long distances. The conductors shall be 18/19 AWG stranded copper insulated with polyvinyl chloride. The copper conductors shall be twisted in pairs and covered by a flame retardant (CMP) PVC jacket.