General > General Technical Chat
The US electrical system
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themadhippy:

--- Quote ---They're actually gone now anyway. At least 8 years gone.
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Have they? Another childhood memory gone.
richard.cs:

--- Quote from: Monkeh on July 03, 2020, 04:06:28 pm ---
--- Quote from: themadhippy on July 03, 2020, 02:46:14 pm ---
--- Quote --- with HV distribution on poles in a urban area just does not exist here at all
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https://goo.gl/maps/zkvizUUCEwnNckxJ8

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Well, they're not poles.. ;)

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This is the transmission vs distribution distinction I was trying to make. We have >100 kV lines on towers passing through some urban areas because at those voltages underground just gets crazy expensive, but the general power distribution for that area, at moderate HV voltages of 11-33 kV (we used to call this "medium voltage" / "MV") is underground. Scrolling way back we were discussing shared HV and LV on poles, etc. and this is something we never get on those kind of towers.

Also it's not a pole ;)


--- Quote from: IanB on July 03, 2020, 07:51:34 pm ---Speaking of which, I wonder how they get motorized vehicle access to maintain their poles? Or for that matter the transmission tower visible on the other side of the canal? In California transmission and distribution lines tend to be placed along a vehicular right of way. In the UK they seem to get plonked down anywhere across the countryside.


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In this case probably either by driving carefully along the towpath which might just have enough gap between poles and water, or by boat. A lot of distribution poles here are across farmland and and accessed with offroad vehicles.


--- Quote from: IanB on July 03, 2020, 07:51:34 pm ---The pole in the foreground appears to be burnt. Lightning strike perhaps?

https://goo.gl/maps/MhbJjs7dMU1i61JF9

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This is 33 kV distribution, and I think the black areas on the pole are just places where the wood preservative is darker.
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