Sandy
#362
Some discussion here. I'm surprised by the last bullet on disadvantages. I've always felt that overground poles would snap in a large earthquake, but the recent experience in Auckland suggests that underground cables may be more susceptible:
http://en.wikipedia.org/wiki/Undergrounding
http://en.wikipedia.org/wiki/Undergrounding
At least earthquakes are far less frequent than hurricanes and blizzards. Underground cabling could be made somewhat earthquake proof, not totally, but there comes the cost again.
#363
Heading for Poppyland










Joined: Jul 2007
Posts: 17,518
From: North Norfolk and northern New York State











Hope things get more comfortable for you soon in respect to electricity & other services..
#366
When you speak of electrical infrastructure, do you mean transmission:

or distribution:

Or both. I must have sinned badly because for a while, I had to design both to make a living.

or distribution:

Or both. I must have sinned badly because for a while, I had to design both to make a living.
#367
Banned






Joined: Jun 2012
Posts: 1,065











When you speak of electrical infrastructure, do you mean transmission:
http://www.telecommunication-equipme...-sd01-3a-b.jpg
or distribution:
http://static.ddmcdn.com/gif/electricity-4.jpg
Or both. I must have sinned badly because for a while, I had to design both to make a living.
http://www.telecommunication-equipme...-sd01-3a-b.jpg
or distribution:
http://static.ddmcdn.com/gif/electricity-4.jpg
Or both. I must have sinned badly because for a while, I had to design both to make a living.
How are the ATMs? Are people in badly hit areas able to withdraw money? Has crime increased?
#368
Heading for Poppyland










Joined: Jul 2007
Posts: 17,518
From: North Norfolk and northern New York State











When you speak of electrical infrastructure, do you mean transmission:
http://www.telecommunication-equipme...-sd01-3a-b.jpg
or distribution:
http://static.ddmcdn.com/gif/electricity-4.jpg
Or both. I must have sinned badly because for a while, I had to design both to make a living.
http://www.telecommunication-equipme...-sd01-3a-b.jpg
or distribution:
http://static.ddmcdn.com/gif/electricity-4.jpg
Or both. I must have sinned badly because for a while, I had to design both to make a living.
#369
Surely it doesn't have to be an either/or across the whole country? Do whatever is best to suit local conditions, so if burying cables isn't good in earthquake prone areas you wouldn't do it in much of the West coast, but it would be great in areas prone to wind and/or snow and/or ice. I hadn't realised it increased the cost of transmission so much so on a purely economic factor, would it be worth it versus the cheaper overhead + occaisional weather outage? As has been said upthread, the actual cost to customers (both residential and business, emotional and financial) don't seem to factor in the equation here.
Mind you, the same argument can be made for anything underground in earthquake areas - I believe there were issues with water, gas and sewer pipes after the Christchurch quake (liquefaction caused pipes to "rise", damaging 80% of water and sewer services according to wiki). And yet we still do it....
Mind you, the same argument can be made for anything underground in earthquake areas - I believe there were issues with water, gas and sewer pipes after the Christchurch quake (liquefaction caused pipes to "rise", damaging 80% of water and sewer services according to wiki). And yet we still do it....
Last edited by yellowroom; Nov 1st 2012 at 9:53 am. Reason: added Christchurch info
#370
The transmission line is in China but we have many similar, the distribution is American. I don't know about ATMs in Jersey NY and Connecticut but with the power out....
#371
It's the same every year...at least once a year. This time last year we were in exactly the same position because of snow. The US needs to get its arse in gear and get it sorted out.
#372
Speaking of, the meme going around with Romney as Gov for MA vetoing the plans to spend $5.7M in flood prevention in Peabody...which 2 years later, the downtown flooded and cost $12M to fix...
#373
The power is always on the fuzz or going down in the winter due to a blizzard or even some light snow fall that pulls a tree or utility pole down.
#374
There is a cost benefit balance. In NY it is a "Heavy Loading District" and was designed for 1/2" of radial ice on the wires and structure and a 4 lbs/sq. ft. wind load. Higher wind loads shake the ice from the wires. We have had storms following others in fast succession so more ice gets added. This may, or may not, be attributable to GW.
#375
I've posted this comparison of overhead and underground transmission and distribution before. Note the voltage limitations etc.
http://www.puc.nh.gov/2008IceStorm/S...2006-09-09.pdf
http://www.puc.nh.gov/2008IceStorm/S...2006-09-09.pdf






