Temperature of conductor

The temperature of a power cable is the conductor temperature rise above the ambient temperature plus the

Symbol
$\theta_c$
Unit
°C
Formulae
$\theta_a+\Delta \theta_c+\Delta \theta_{sun}$Cables in air
$\theta_a+\Delta \theta_c-\left(v_4-1\right) \Delta \theta_x+v_4 \Delta \theta_p$Cables buried
$\theta_{de}+\Delta \theta_c$Cables in tunnel
$\theta_a+\Delta \theta_c+\Delta \theta_{0t}$Cables in tunnel (IEC 60287-2-3)
$\theta_{at}+\Delta \theta_c$Cables in trough or in channel (Heinhold)
$\theta_a+\Delta \theta_c+\Delta \theta_p$Cables subsea
$\theta_e+\Delta \theta_c$Cables in riser