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Diameter over armour bedding

Symbol
$D_{ab}$
Unit
mm
Formulae
$F_x D_{shj}+2\left(t_f+t_{ab}\right)$Multi-core cables type SS
$D_{sh}+2t_{ab}$otherwise
Related
$D_{sh}$
Diameter over sheath [mm]
$D_{shj}$
Diameter of sheath jacket [mm]
$F_x$
Geometrical distance factor for multi-core cables
$t_{ab}$
Thickness of armour bedding [mm]
$t_f$
Thickness of filler/belt insulation [mm]
Used in
$A_{ab}$
Cross-sectional area of armour bedding [mm$^2$]
$C_{sa}$
Capacitance shield - amour [F/m]
$C_{sg}$
Capacitance shield - ground [F/m]
$D_{ar}$
External diameter of armour [mm]
$d_{ar}$
Mean diameter of armour [mm]
$p_{ab}$
Factor apportioning the armour bedding
$r_{osc}$
Radius over capacitive insulation layers [mm]
$r_{z4}$
Radius of armour (inner) [m]
$\rho_{ar}$
Specific electrical resistivity of armour material [$\Omega$.m]
$T_{ab}$
Thermal resistance of armour bedding [K.m/W]