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Hi all, We have PLSCADD licenses which were expired couple of years ago but still working without any issues lacking technical support and upgrade capability. While thinking about upgrading licenses, I looked up the recent improvements to the program to see if it is worth upgrading or not. In...

Hi all, Wondering if anyone delved into picking specific anchor type & holding power in PLS-CADD/ PLS-POLE. I'm working on one of the OH distribution projects where I may need to use different holding power anchors (varying from 10,000 lbs to 19,000 lbs) based on the primary & neutral strung on...

@stevenal: Yes, I did consider the ice coated cable with bare neutral and it did pass the required clearance. Like bacon4life said, with the extreme wind case, I didn't know that the temp of OH conductor can be calculated by IEEE 738, and it varies with wind speed. Good to know that... Thanks,

Hi all, I've been working on designing a new 3-phase OH distribution line and going through NESC book to find what are the different weather cases to check for on OH primary and neutral conductors. I recently found that if primary and neutral being used are different conductors, then the top...

It depends on the place you're doing the project. In the US, NESC defines three different zones: Light loading, Medium loading and Heavy loading. Light loading - 0" ice, 4psf wind, Medium loading - 1/4" ice, 4psf wind, Heavy loading - 1/2" ice, 4psf wind. You can find the NESC zones map in NESC...

Informative @jghrist. Moving forward on this discussion, my understanding from the above is, the horizontal tension is the tension at which the conductor was strung - since only horizontal component is present at low point and it is equal to the total tension at which the conductor was strung...

Hello all, I have had this question from long time and I couldn't find an accurate answer to this anywhere! Well, you may be familiar with Sag of a Transmission or Distribution line and it is defined as Sag = [(weight in lbs/ft)*(span distance in ft)^2]/[8 * (Horizontal Tension)] All the...

Well, I am glad to know that there are electrical engineers using PLS-CADD. We have been using it to check the clearances between power lines and communication lines as per NESC standards and perform the structural analysis as well on existing distribution poles. Prior to doing this, we collect...

Hello all, I have been using PLS-CADD on electric distribution systems for 7 months. It's been like a structural engineering tool for me but I end up in building something more of electric distribution system. I wonder does PLS-CADD have any electrical engineering side of it or are there any...

Yeah, but on a 75kVA transformer with 12.47kV (LL) on primary, full load current is around 3.5A...!! Now I've got an option to pick either 200A/ 600A elbow!! How does that work?

Hello jghrist, I appreciate your comment but on what factor do we select 200A/ 600A elbows? Does that depend on primary full load current or secondary full load current of a transformer? -Rohit

Hello all, Does anyone has an idea about 200A & 600A loadbreak elbows? I came across this while designing a pad-mounted transformer. Initially I thought that this ampere rating would be calculated from rated kVA and rated Voltage but for a 75kVA transformer with 13.2kV (L-L) on primary would...

I apologize, I should have asked for wind and ice area instead of load, and this is what exactly I am looking for. Thank you very much bhyde.

Hello everyone, I have been doing pole audit on electric distribution poles (Wooden - Southern Pine). As a part of it, I need to build poles in PLS-POLE which will be later used in PLS-CADD for structural loading and clearances. Recently I came across equipment such as capacitors, voltage...