ROCK-FLEX® ESS-K 600V, 1kV and 2kV are single conductor, power cables that utilize flexible Class K conductors. Their tough LSZH thermoset construction allows for its use in Central Office Power (COP) applications. The wire’s intended use is for 600/1000V/2kV AC or DC applications in central offices (COs), outside plant (OSP) remote terminals, customer premises and building entrance terminals (BETs), cell towers and data centers. The wire is approved by Telcordia to GR-347-Core “Generic Requirements for Telecommunications Power Cable” Central Office Power (COP). LSZH insulation is preferred for highly occupied environments or areas with large concentrations of equipment.