The following equation is for maximum pulling tension based on pulling by conductor but there are other equations for pulling by a basket-weave grip over the cables outer jacket. The maximum nominal pulling tension that a single core cable can withstand is rated to be 22,N. Due to the unevenly distributed forces of multicore cables when bending, this rating becomes 44,N for a three core cable [ref. Sidewall pressure is a measure of the normal force pushing a cable against the conduit wall in a conduit bend.
Sidewall pressure depends on the tension coming out of the bend and the radius of the bend. Sidewall pressure is specific to each bend. There are various complex equations used for calculating the tension and sidewall pressures along the following section types of a cable run:. Where there are more than two cables being pulled at the same time into a conduit then it is important to calculate the cable clearance and jamming ratio.
This will help to ensure the cables do not get stuck inside the conduit along the route. Cable Pro Web software was used for performing the following calculations. Pulling from either direction will not result in tension limit or sidewall pressure limit being exceeded.
The current rating of cables is affected by the installation conditions and the cable design and materials. In this report a parametric study of the factors which affect current ratings is presented. Email: enquiry elek.
Need Help? Lodge a Support Ticket. Fill out your details below to begin your trial. Once your information has been submitted you'll be able to download the software. If we fell short, please tell us more so we can address your concerns.
If you do not wish to address your concerns here and prefer to post a review, click here. Call Us: Email Us: enquiry elek. Login Cable Pro Menu. Cable Pulling Tension Calculations. Select the correct size pulling …. Medium-voltage MV cable pulling is not just slopping on lubrication and applying brute force. An MV cable is much like a piece of sophisticated switchgear, with …. But I have never yet been involved in calculating cable pull tension. Cable Pull Calculator — Instructions. This calculator estimates the pulling tension necessary to pull cable through inputted sections.
In regards to cable pulling calculations, when calculating the sidewall pressure I found 3 different equations that vary based on the conductor configuration in the …. Utilize ETAP cable pulling software for proper cable systems design and cable tension, sidewall pressure calculation.
Benefits Pull-Planner 4. Features Pull-Planner 4. User-friendly interface Multiple languages Measurements in pounds lbf , kilonewtons kN , and kilograms kgf Extensive COF database including multiple cable jacket and conduit types Specific training topic support videos online A comprehensive help menu backed with technical support and engineering seminars from Polywater Help Menu.
Specifications Pull-Planner 4. Available in four languages: English, Spanish, German, and French Accessible as an internet download Operates on standard Windows and allows for data transfer to Excel for printing, saving, and documenting Installation consumes megabytes of hard-drive space Pull-Planner 4.
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