Cableizer ®

External diameter object

Symbol
$D_{e}$
Unit
mm
Formulas
$\frac{n_{c} D_{shj}+\left(D_{shj}+2t_{ab}+2t_{ar}+2\left(t_{j}+t_{jj}\right)\right) \pi}{\pi}$multi-core cables without filler (duplex/triplex)
$D_{j}$otherwise
Related
$D_{j}$
Diameter over jacket [mm]
$D_{shj}$
Diameter over sheath jacket [mm]
$n_{c}$
Number of conductors cable
$\pi$
Archimedes' constant $\pi$
$t_{ab}$
Thickness armour bedding [mm]
$t_{ar}$
Thickness armour [mm]
$t_{j}$
Thickness jacket [mm]
$t_{jj}$
Thickness of additional layer over jacket [mm]
Used in
$A_{d,fill}$
Free cross-sectional area inside duct [mm$^2$]
$C_{ag}$
Capacitance armour - ground [F/m]
$CC_{pull}$
Conduit clearance [mm]
$CF_{pull}$
Conduit fill [$\%$]
$CJ_{pull}$
Conduit jamming ratio
$CR_{pull}$
Conduit ratio
$D_{core}$
Diameter over core cable [mm]
$D_{eq}$
Equivalent diameter of a group of round objects [mm]
$D_{o}$
Outer diameter [m]
$D_{wall}$
Diameter pipe wall [m]
$D_{x}$
Characteristic diameter daily load [mm]
$D_{x,w}$
Characteristic diameter weekly load [mm]
$D_{x,y}$
Characteristic diameter yearly load [mm]
$f_{wc}$
Weight correction factor
$GMD_{k}$
Geometric mean distance between phases of the same system, short-circuit [m]
$p_{j}$
Apportioning factor jacket
$r_{mbi}$
Minimal bending radius, installation [m]
$r_{mbp}$
Minimal bending radius, pulling [m]
$T_{4i}$
Thermal resistance medium in the duct [K.m/W]
$T_{riser}$
Thermal resistance riser [K.m/W]
$V_{i}$
Volume insulation [mm$^3$]