# Temperature of conductor

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

• temperature rise by solar radiation for cables in air
• temperature rise by other buried cables for buried cables
• critical soil temperature rise for buried cables where drying out of soil can occur
• temperature rise by crossing heat sources $\Delta\theta_{0x}$ at the hottest point

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
Related
$\Delta \theta_{0t}$
$\Delta \theta_{0x}$
$\Delta \theta_c$
$\Delta \theta_p$
$\Delta \theta_{sun}$
$\Delta \theta_x$
$\theta_a$
$\theta_{at}$
$\theta_{de}$
$\theta_e$
Used in
$\delta \theta_c$
$\Delta \theta_{ce}$
$\Delta \theta_{gas}$
$h_{rad,ce}$
$I_c$
$T_1$
$T_{rad,ce}$
$\theta_{ar}$
$\theta_e$
$\theta_{film}$
$\theta_{gas}$
$\theta_s$
$\theta_{sc}$
$\theta_{sh}$
$\theta_{sp}$
$W_{conv,ce}$
$W_{rad,ce}$