The following recommendations are based on a study sponsored by ICEA and can be modified with experience and if more information is known:
A. Maximum Pulling Tension on Cable
B. Maximum Permissible Pulling Length (Lm = Tu/CW)
Where: Lm = pulling length, feet (straight section)
Tm = maximum tension, lb.
W = weight of cable per foot, lb.
C = coefficient of friction (usually 0.5)
C. Pulling tension must not exceed the smaller of these values:
Pulling Eye: T (Cu) = Number of Conductors x circular mils x .008
Basket-Group: T = 1000 lbs. per grip
Sidewall Pressure: p = 300 lbs. x radius of curve in feet