Transmission Upgrade

By Bart Magoffin; posted December 9, 2016

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In Northern Calif, the pioneer area of long distance 60 KV transmission, the new preferred standard for such pole lines seems to be 115KV. This line from Stockton, the hydro El Dorado Power House above Placerville to Sacramento has been at 60 for well over 100 years, now taller steel poles and post insulators for the upgrade. "Too many air conditioners running now during the hot summer peak" said an engineer on site. There were a few 1960's era 3-part OB "flower pots" left on site, original insulators were M-3725's, I found a few over the years.