[External] Re: 10g residential CPE

Sun Dec 27 18:32:58 UTC 2020

On 12/27/20 10:26 AM, Baldur Norddahl wrote:
> All of the 400V and 10 kV is buried. That means no wires along 
> streets, anywhere.
>
> The long haul transmission network consists mostly of 150 kV and 400 
> kV lines. That has been partly buried, especially near and in cities. 
> There was a project to have it all buried but was abandoned halfway 
> due to cost.
>
> But then it is all fully redundant, so they will just power it down if 
> it needs maintenance. My company is digging for FTTH and in the few 
> cases we need to cross one of these bad guys, they will shut it for us 
> while we are working. Nobody looses power of course.
>
> The 10 kV network is redundant too. We managed to hit those a few 
> times.  That will cause a power interruption for 10 to 20 minutes 
> until they reroute the power. I believe mostly for safety, they need 
> to be sure that the damaged line will not become energized again.
>
It's hard to build in redundancy when the entirety of lower Manhattan 
was under water though. Dealing with that must have been a hellacious job.

Mike