**What is the Sidewall Pressure for cable installation ?**Sidewall pressure is the vector force that exists on the cable as it is pulled through a bend. Because thesurface area of the bend is smaller in small radius bends, that force is concentrated over a much smallerarea. Most of the time sidewall pressure is the limiting factor in a cable pull.Sidewall pressure is calculated as follows:

For one single-conductor cable or multiple-conductor cable under a common jacket SP =T—R

For three single-conductor cables, cradledSP = (3ω -2) ∙—T (3R)

where:

T = tension coming out of the bend in pounds

R = bend radius, in feet

ω = weight correction factor, dimensionless

SP = sidewall pressure in pounds/food

**Weight Correction Factor**The configuration of cables can affect cable tension. A weight correction factor (w) isused in the tension equations to account for this effect. The value for the weight cor-rection factor is determined from the equations that follow:

1 cable (single) ω =1

3 cables (Triangular) ω =1/(1-(d/(D-d))^2)^0,5

3 cables (Cradles) ω =1+4/3*(d/(D-d))^2

4 cables or more ( complex) ω =1,4

ω= weight correction factor

D= inner diameter of conduit

d= outside diameter of the cable