Cableizer
Log in

Thickness of insulation to sheath

Insulation thickness between conductors and sheath used to calculate $T_1$ with following considerations:

Type of screen/sheath of multi-core cables

Symbol
$t_1$
Unit
mm
Formulae
$t_i+t_{scb}+t_{scs}+\frac{\Delta d_{sh}}{2}$Single-core cables
$t_i+t_{scb}+t_{scs}+\frac{\Delta d_{sh}}{2}$Multi-core cables, type SS
$t_i+t_{scb}+t_{scs}+t_f+\frac{\Delta d_{sh}}{2}$Multi-core cables, type SC
$t_i+t_f+t_{scb}+t_{scs}+\frac{\Delta d_{sh}}{2}$Multi-core cables, type CC
$t_i+t_{scb}$Pipe-type cables
Related
$\Delta d_{sh}$
Depth of corrugation [mm]
$t_f$
Thickness of filler/belt insulation [mm]
$t_i$
Thickness of insulation [mm]
$t_{scb}$
Thickness of screen bedding [mm]
$t_{scs}$
Thickness of screen serving [mm]
Used in
$G_1$
Geometric factor $G_1$
$T_1$
Thermal resistance between one conductor and sheath [K.m/W]
$t_{1t}$
Thickness of insulation to sheath, transient [mm]
$X_G$
Factor $X_G$
$Y_G$
Factor $Y_G$
$Y_K$
Factor $Y_K$