To further emphasize what Joe Maurath was explaining in the previous photo, here is another Los Angeles Dept. of Water & Power photo I took a couple of years ago in the Sunland-Tujunga area. This photo shows a typical DWP pole line leading from a substation (not very visible) and is one of their many 34.5 kV sub-trans. lines on later style gray multiparts. They are probably NGK's, if the one I "rescued" from them one time is any indication. These high voltage lines are everywhere in DWP's territory (which is within the vast city limits). A lot of brown multiparts are still in service also, along with line posts in both colors. What amazes me is that instead of abandoning the use of multiparts altogether, DWP chose to continue the use of them in gray, instead of just going to line posts only. This is a single circuit version of the lines but they are mostly double circuited on 3 cross arms. Three 2400 volt delta primary circuits are also shown heading for neighborhood distribution. LA DWP has, by far, the largest 2.4 kV primary system left in N. America and is apparently not interested in upgrading the voltage. I would suspect that they believe it is best for the high density service areas they have. Most, if not all, of DWP's power BTW, comes from far away Boulder Dam, Nevada.