# Documentation

 Symbol Name Unit C $C_{av}$ Heat capacity of the air flow W/K $C_b$ Capacitance of insulation F/m $C_{bq}$ Constants $C_1$ - $C_7$ of multi-layer backfill $c_c$ Distance between the axis of a conductor and the cable center mm $C_{c1}$ Thermal capacitance, 1st loop J/m.K $C_{c2}$ Thermal capacitance, 2nd loop J/m.K $C_{c3}$ Thermal capacitance, 3rd loop J/m.K $C_{c4}$ Thermal capacitance, 4th loop J/m.K $c_{color}$ Wiring color code $C_{g1}$ Factor C1 for partially buried pipes $C_{g2}$ Factor C2 for partially buried pipes $C_{g3}$ Factor C3 for partially buried pipes $c_{gas}$ Constant c for a gas under PAC/GIL conditions $c_{ij}$ Coefficient c for view factor $C_{k1}$ Non-adiabatic constant $C_1$ mm/m $C_{k2}$ Non-adiabatic constant $C_2$ K.m.mm$^2$/J $C_{Nu,L}$ Factor C $c_{Nu,r}$ Factor c $C_{Nu,w}$ Factor C $c_{p,gas}$ Specific heat capacity at constant pressure J/kg.K $c_{p,soil}$ Specific heat capacity of soil J/kg.K $c_{p,w}$ Specific heat capacity at constant pressure J/kg.K $c_{shj}$ Factor $c_{shj}$ for jacket around each core $c_{SI}$ Surge velocity of propagation km/s $c_{type}$ Construction of conductor $c_{v,gas}$ Specific heat capacity at constant volume J/kg.K $C_{v,soil}$ Volumetric heat capacity of soil J/K.m$^3$ $c_{v,w}$ Specific heat capacity at constant volume J/kg.K $C_{vair}$ Volumetric heat capacity of air J/K.m$^3$ $CC$ Charging capacity kvar/km $CC_{pull}$ Conduit clearance mm $CF_{pull}$ Conduit fill $\%$ $CJ_{pull}$ Conduit jamming ratio $\mathrm{cos}\varphi$ Power factor $CR_{pull}$ Conduit ratio $cuw$ Standard copper wires mm