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A Cable Too Long

Q: I am currently reviewing a URD circuit with a cable segment that is 6,200′ per our one-line and GIS. It is our regular #2 db [direct buried] cable. I am considering the installation of pull-boxes to break up the many long segments prior to attempting injection. What is the practical limit to TDR [time-domain reflectometer] testing? What is the practical injection limit? I assume in the best case that there at least a construction splice every 2000 feet, but there may be more that have to be replaced.

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Wet, Wetter and Wettest

Wet, Wetter and Wettest Q: I have two areas under consideration for rejuvenation next year. The first is a sub-division with 40 year-old cable that is in relatively dry sandy soil. The second sub-division has 15-20 year-old cable that is in very wet, swampy soil. All other things being equal, which area would enjoy the…

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Fabric Tape Conductor Shield

Q: I am wondering if you can provide some thoughts or comments on a cloth fabric semi-con we have here on some older #2 Cu cables, 15kV. Does the Cablecure 732/733 fluid harm this fabric? Does the fluid react with any semi-conducting materials like carbon? Does Novinium think the injection process disturbs or harms the fabric?

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Better Than New

Better Than New Q: Why would I use rejuvenation, when I can have new cable? A: I suspect that you’re not a circuit owner. Do you work for one of the cable manufacturers? If you were a circuit owner, you would know that money does not grow on trees and rejuvenation is almost always considerably…

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Suitable for Treatment

Suitable for Treatment Q: We’ve taken some photographs of cable samples identified with off-line PD testing.  I was hoping to get your opinion of the cable and if injection would be able to address these issues. On two samples, we found the XLP insulation was a greenish color. We’ve never found cables discolored before and…

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EPR (Part 3 of 3)

EPR (Part 3 of 3) Over the course of the last two days I delivered two posts. In the first, titled “EPR (Part 1 of 3),” I provided a response to the inquiry on whether it made sense to rejuvenate aging EPR cables. The short answer was yes and I dispelled some EPR myths along…

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EPR (Part 2 of 3)

EPR (Part 2 of 3) In yesterday’s post, EPR (Part 1 of 3), I provided a response to an inquiry on whether it made sense to rejuvenate aging EPR cables. The short answer was yes and I dispelled some EPR myths along the way. This post explores the chemistry of EPR and dispels another myth suggested…

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