Factor apportioning the jacket

Factor for apportioning the thermal capacitance of a cable jacket/oversheath

Symbol
$p_{j}$
Formulae
$\frac{1}{2 \ln{\left(\frac{D_{e}}{D_{a_{2}}} \right)}} - \frac{1}{-1 + \frac{D_{e}^{2}}{D_{a_{2}}^{2}}}$
Related
$D_{a_{2}}$