MULEKNOT + MULETAPE = a winning combination! Determine if the tension is lower if the cable is pulled from the opposite end by repeating the same steps from the other end.Repeat step 6 until the last point results in the cable exit.Add the resulting tension to the next length of conduit and repeat steps 2-5.Multiply the result by the pull factor.Multiply the bend factor by the length of conduit.Sketch the pull and determine the lengths between bends.Multiply the weight by the coefficient of friction for either single cable or multiple cables to determine the pull factor.Determine the weight per foot of your cable.To apply these formulas in your cable pulling application, follow these steps: Please note the tension changes depending on the starting point of the pull.Īs you can see from the examples above, pulling from point J to A results in a lower overall pulling tension consequently, assuming the recommended knot is tied, a lighter duty MULETAPE can be used to complete the job. The following is an example of a 460-foot pull of a 3 single conductor #2 15kV in 4” PVC conduit. It might be helpful to make a sketch of the conduit run, showing bends. Usually, lower tension can be achieved by placing the cable reel closer to the shortest 90-degree bend. It is important to determine the starting point that will exert less strain on the cable. It should be noted that pulling tension can vary on the same pull. POINT TO POINT LOOK UP TABLE – FOR BEND ANGLE, DEGREES Bend Angle, Degrees The tension calculator below is intended to be used as a guide. Pulling forces vary depending on fill ratio, terrain and underground architecture actual field conditions should be considered. MULETAPE is offered in tensile strengths varying from 400 to 6000 lbs. If pulling tensions are more than the maximum recommended limit, an intermediate pull box or manhole will need to be placed.
It is important to consult the cable manufacturer’s specifications for the maximum pulling tension before installing the cable. Pulling tension is a cumulative calculation with each bend in the conduit run contributing to more drag as the pull goes on. MULETAPE CALCULATORĬable weight is the biggest influence in MULETAPE recommendations, followed by the number of bends and finally the conduit size.
MULETAPE pulling tape for wires and cables is a laboratory and field tested for strength, temperature and chemical resistance, low elongation, low coefficient of friction (slips easily even on long pulls), and long life. Available in a variety of strengths (up to 6,000 lbs or 2727 kg) which enables extensive application use. This improves efficiency and prevents “snap back”, which occurs when a rope under high tension elongates and either breaks or snaps back often injuring the installer.Ī variety of reel lengths of the cable pulling tape is available to suit any installation.
NEPTCO tapes, distributed by Thorne & Derrick, are manufactured with a low stretch polyester material that distributes heat across its wide, flat profile. To see the benefits of using MULETAPE over traditional cable pulling methods, see our Blog: MULETAPE V ROPE MULETAPE is a unique pull tape designed to reduce damage to the underground plant – resulting in improved efficiency, and enhanced worker safety. This Blog demonstrates how the correct tape for pulling cables can be selected, with the MULETAPE calculator.
NEPTCO is a global leader in the manufacturing of materials used for the Detection & Pulling of Cables, including MULETAPE, for a wide variety of commercial and industrial applications. MULETAPE Calculator | selecting the right tape for the pulling of cables Muletape
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