# 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 of the conductor(s) of the rated cable, due to crossing heat sources, at the hottest point.

Symbol
$\theta_{c}$
Unit
$^{\circ}$C
Formulae
 $\Delta \theta_{c} + \Delta \theta_{sun} + \theta_{a}$ cables in air $\Delta \theta_{c} + \Delta \theta_{p} v_{4} - \Delta \theta_{x} \left(v_{4} - 1\right) + \theta_{a}$ cables buried $\Delta \theta_{c} + \theta_{de}$ cables in tunnel $\Delta \theta_{0t} + \Delta \theta_{c} + \theta_{a}$ cables in tunnel (IEC 60287-2-3) $\Delta \theta_{c} + \theta_{at}$ cables in trough or channel $\Delta \theta_{0x} + \theta_{c}$ cables crossing external heat sources $\Delta \theta_{ce} + \Delta \theta_{s} + \Delta \theta_{tube} + \theta_{a}$ cables in j-tube/riser $\Delta \theta_{c} + \Delta \theta_{p} + \theta_{a}$ cables subsea
Related
$\Delta \theta_{0t}$
$\Delta \theta_{0x}$
$\Delta \theta_{c}$
$\Delta \theta_{ce}$
$\Delta \theta_{p}$
$\Delta \theta_{s}$
$\Delta \theta_{sun}$
$\Delta \theta_{tube}$
$\Delta \theta_{x}$
$\theta_{a}$
Ambient temperature [$^{\circ}$C]
$\theta_{at}$
$\theta_{de}$
Used in
$\Delta \theta_{c}$
$\delta \theta_{c}$
$\Delta \theta_{ce}$
$\Delta \theta_{gas}$
$h_{rad_{ce}}$
$I_{c}$
$R_{c}$
$T_{1}$
$T_{conv_{ce}}$
$T_{rad_{ce}}$
$\theta_{ar_{1}}$
$\theta_{ar_{2}}$
$\theta_{e}$
$\theta_{f}$
$\theta_{gas}$
Gas temperature [$^{\circ}$C]
$\theta_{s}$
$\theta_{sc}$
Temperature of screen [$^{\circ}$C]
$\theta_{sh}$
Temperature of sheath [$^{\circ}$C]
$W_{conv_{ce}}$
$W_{rad_{ce}}$