Neutral Corrosion & Novinium Warranty
I have been asked to pursue something in writing concerning the 50% neutral corrosion and Novinium’s warranty. I respectfully request to have this from Novinium by quitting time this Friday, January 25, 2013. Thank you in advance for your cooperation in this matter and feel free to call me with questions or problems.
Go to http://www.novinium.com/Warranty/ and search for the word “corrosion” … you won’t find it! The warranty is purposely silent on neutral corrosion.
The Novinium warranty is intentionally silent on neutral corrosion, because neutral corrosion only rarely causes cable to fail.
Less Short Answer
To understand why the short answer is so short, it is really useful to understand the purpose of the neutral and the consequences of various levels of neutral corrosion on the performance and reliability of the cable. For more, read the paper, “Neutral Corrosion—Significance, Causes & Mitigation” prepared and presented by some of the cable experts at the Insulated Conductors Committee of the IEEE that created IEEE 1617™, the IEEE “Guide for the Detection, Mitigation, and Control of Concentric Neutral Corrosion in Medium Voltage Underground Cables.”
Based upon IEEE 1617 and the aforementioned webinar many circuit owners have chosen 50% corrosion as their cutoff point for rejuvenation. But you get to make that determination yourself. You need only to communicate your wishes to the Novinium masters that proide your services. If you would like to discuss your choice with an expert … you can find them at Novinium. As you will learn in the webinar the 50% rule-of-thumb is a “glass half-full” proposition, because the rate of corrosion in direct buried cables declines over time. The pessimistic “glass half empty” perspective is not supported by observation.
Even if you have the occasional neutral corrosion in excess of 50%, don’t despair. The corrosion can be pinpointed and repaired, generally at a fraction of the cost of replacement. The webinar explains that option too.