Cable Pulling Calculation - Mineral Insulated Cable Sidewall Pressure

[SamTech]

We have multiple parallel runs of #350 MCM / 1C mineral insulated (MI) cables. The longest run without a field splice will be around 310 feet. We will use 24"/36" pulleys (roller/sheave) for every turn in the path of the cable. Each of the pullies will be mounted appropriately at the adjacent structure. We have done many of these kind of jobs in the past. This peculiar job, the client is asking us (EC) to provide (point force) calculations for the mounting location of the pulley, and if the structure there would be able to withstand it or not. We assume it is the sidewall pressure for each of the turning points. In normal scenarios where we use THHN/XHHW, etc. cable in conduit, we use SIMpull (Southwire) cable pull calculation sheets. Southwire does not make solid copper MI-cables. nVent is the only one who makes it and they do not have pulling calculator. We could not find any other information we could use for calculation for MI-cables. Or we are not sure how to use it for MI-cable calculations.

#350MCM/1C cable is 1.625 lbs./ft., O.D. 0.834", Solid Copper, manufacturer recommended max pulling pressure 3,000 lbs, not to exceed 8,800 lbs.

Any help is appreciated. Please let me know if you need any more information. Thank you.