Cable-Pulling Lubricant Quantity
Estimates the pulling lubricant a conduit run takes, so the crew does not run short mid-pull: gallons = K x length x conduit ID^2 x bend factor. A 400 ft run in 3 in conduit wants about 5.4 gallons (round to a full pail), and a bend-heavy, high-fill pull at a 1.3 bend factor pushes that past 7. K is a film-coating rule (~0.0015, the common Polywater rule); under-lubing risks a stuck cable, so round up and keep a spare pail.
Formula and source
gallons = k_factor x length_ft x conduit_id_in^2 x bend_factor.
Film-coating lubricant estimate by name (gallons proportional to length x conduit ID^2, scaled by a bend/fill factor); rule-of-thumb.
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