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  #1   Report Post  
Jonathan@Home
 
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Default Electric pylons... are they noisy?

In my days in the military I spent a week at a unit training soldiers for
peace keeping duties. Over the mock town was a pylon run and the sound it
made was like heavy rain falling. If they are all like that I wouldn't want
to live near by.

Cheers
Jonathan


  #2   Report Post  
Andrew Gabriel
 
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Default Electric pylons... are they noisy?

In article ,
"Dave" writes:
We're planning to move soon but noticed there are overhead electric pylons
in some parts of the town... health and aesthetic issues aside, we are also
concerned about the fizzy and/or buzzing noise they are said to make.

Anyone confirm this and suggest at what distance the noise should be
inaudible?


I have often heard the overhead lines near me buzzing in damp weather. I
dont know whether it only happens at the pylons or not, but there is a pylon
within about 30 metres of where I have heard buzzing.


It happens all along the length of the cables, not just at pylons.
I used to walk under some on the way to work, and you could clearly
hear when you were underneath, even when visibility was such you
couldn't see them. Alongside a main road, you can hear them for
perhaps 100 yards either side (these were the 275kV ones). In the
quiet countryside, I would imagine that would be extended. As Dave
said, it's more noticable in damp weather.

--
Andrew Gabriel
  #3   Report Post  
harrogate
 
Posts: n/a
Default Electric pylons... are they noisy?


"Dave" wrote in message
...
We're planning to move soon but noticed there are overhead electric

pylons
in some parts of the town... health and aesthetic issues aside, we are

also
concerned about the fizzy and/or buzzing noise they are said to make.

Anyone confirm this and suggest at what distance the noise should be
inaudible?


I have often heard the overhead lines near me buzzing in damp weather. I
dont know whether it only happens at the pylons or not, but there is a

pylon
within about 30 metres of where I have heard buzzing.



At high voltages (275KV and 440KV) there is often a fizzing noise caused by
low level corona discharge around the glass insulators. This discharge can
be visible on a dark night, especially during rain or high humidity.

The main downside is that the discharge can produce wideband electrical
noise which can upset anything from your hi-fi to your TV to your computor,
depending on level and distance.


--
Woody




  #4   Report Post  
John
 
Posts: n/a
Default Electric pylons... are they noisy?

Some are only (!) 132kv. They are local distribution and tend to be quiet.

Don't climb up with your voltmeter! There is usually a notice with the
voltage. Long insulators = higher voltage.

http://users.tinyonline.co.uk/bigh/bigh/pylonof.htm

--


Regards

John

j
"Stuart" wrote in message
...
Anyone confirm this and suggest at what distance the noise should be
inaudible?

Many thanks,

Lionel.



We have a pylon near where I work. It's very noisy when it's wet. A
colleague of mine opened his umbrella in the car park, and sparks started
to fly off of it! Personally, I wouldn't want to live near one - I guess
it depends on how close it is. Remember, you may want to sell this house
in the future, and other buyers may have the same concerns as you.

S.



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.497 / Virus Database: 296 - Release Date: 04/07/2003


  #5   Report Post  
Simon Avery
 
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Default Electric pylons... are they noisy?

"Lionel" wrote:

Hello Lionel

L| We're planning to move soon but noticed there are overhead
L| electric pylons in some parts of the town... health and
L| aesthetic issues aside, we are also concerned about the
L| fizzy and/or buzzing noise they are said to make.


L| Anyone confirm this and suggest at what distance the noise
L| should be inaudible?


Not all pylons are equal.

The big ones do buzz in misty or damp weather, very audibly. Maybe you
can't
hear 'em behind double glazing, I don't know. I DO know it plays merry
hell
with mobile and radio signals. Their buzzing also seems to vary
according to
time of day (I'm guessing load).

Small pylons don't buzz, as a rule.

Overhead power lines (2 or 3 wires, 11 or 33kv) don't buzz, neither
does
overhead LV (240vac, usually strung vertically around here). They do
arc quite
prettily when the wind pushes 'em together though.

--
Simon Avery, Dartmoor, UK
uk.d-i-y FAQ: http://www.diyfaq.org.uk/



  #6   Report Post  
Ian
 
Posts: n/a
Default Electric pylons... are they noisy?

"Lionel" wrote in message ...
Hello,

We're planning to move soon but noticed there are overhead electric pylons
in some parts of the town... health and aesthetic issues aside, we are also
concerned about the fizzy and/or buzzing noise they are said to make.

Anyone confirm this and suggest at what distance the noise should be
inaudible?

Many thanks,

Lionel.


The normally only buzz on misty nights and from my own experiance you
have to be fairly close as well.

Ian
  #7   Report Post  
Dave Liquorice
 
Posts: n/a
Default Electric pylons... are they noisy?

On Mon, 07 Jul 2003 18:03:31 GMT, Simon Avery wrote:

The big ones do buzz in misty or damp weather, very audibly. Maybe
you can't hear 'em behind double glazing,


Personally I wouldn't want to be that close to a big power line. I
know "they" say that the field is "harmless" but...

Overhead power lines (2 or 3 wires, 11 or 33kv) don't buzz,


Ours sing, I can't quite make up my mind if it's some curious
midfrequency oscilation in the single phase pole transformer or just
wind induced wire whistle that is amplified by the pole.

--
Cheers
Dave. pam is missing e-mail



  #8   Report Post  
John
 
Posts: n/a
Default Electric pylons... are they noisy?


"Lionel" wrote in message
...
Hello,

We're planning to move soon but noticed there are overhead electric

pylons
in some parts of the town... health and aesthetic issues aside, we are

also
concerned about the fizzy and/or buzzing noise they are said to make.

Anyone confirm this and suggest at what distance the noise should be
inaudible?


The buzzing is only the sound of the air molecules being torn apart by the
electric stress on them and is often accompanied by a blue glow in the
dark. The phenomena is know as corona. the range of the sound depends on
atmospheric conditions to a great extent but I would suggest its a bit like
living next to a railway line - you soon get used to the sound


  #9   Report Post  
wanderer
 
Posts: n/a
Default Electric pylons... are they noisy?

"Terry" wrote in message
...
John wrote:

"Lionel" wrote in message
...
Hello,

We're planning to move soon but noticed there are overhead electric

pylons
in some parts of the town... health and aesthetic issues aside, we are

also
concerned about the fizzy and/or buzzing noise they are said to make.

Anyone confirm this and suggest at what distance the noise should be
inaudible?


The buzzing is only the sound of the air molecules being torn apart by

the
electric stress on them and is often accompanied by a blue glow in the
dark. The phenomena is know as corona. the range of the sound depends on
atmospheric conditions to a great extent but I would suggest its a bit

like
living next to a railway line - you soon get used to the sound


Then there are those unsubstantiated stories about people living
near power transmission lines having higher rates of cancer!
Nothing proven or factual AFIK? And that discussion has been
going on for years!


The 'official' line is that nothing has been proved. I worked in the
industry for 35 years, and whilst I would think nothing of wandering around
a major substation, I wouldn't pick a house near a transmission line. I
guess that's personal choice, but I still sometimes get the hairs on the
back of my neck rising when I drive under a 275 or 400kv line. Oh, and BTW,
they're towers, not pylons!)

I understand that all high voltage system fizz/buzz especially in
damp/foggy weather. A rare occurrence in Britain?
If one of those big/long high voltage glass/ceramic insulators
developed a fault (Rare, as I understand it, unless someone
shoots at them etc.) there can be sparks across them or to an
adjacent wire and or the metal or wooden poles. But it's nothing
to worry about. I wouldn't park under/near them though!


I recollect quite by chance parking many years ago under a 275kv line on a
damp and misty morning, waiting for a line crew to turn up - we were
escorting an abnormally high load. I hopped out of the car, and got quite a
belt from induced voltage.




  #10   Report Post  
Peter Parry
 
Posts: n/a
Default Electric pylons... are they noisy?

On Mon, 7 Jul 2003 16:25:11 +0100, "Jonathan@Home"
wrote:

In my days in the military I spent a week at a unit training soldiers for
peace keeping duties. Over the mock town was a pylon run and the sound it
made was like heavy rain falling. If they are all like that I wouldn't want
to live near by.


The ones passing near the CPTA were 440kV, and indeed sang quite
loudly. However it was also a very quiet environment (if you ignored
the odd gunshots, explosions and irate SNCO's).

--
Peter Parry.
http://www.wpp.ltd.uk/


  #11   Report Post  
zaax
 
Posts: n/a
Default Electric pylons... are they noisy?

In article , Peter Parry
writes
On Mon, 7 Jul 2003 16:25:11 +0100, "Jonathan@Home"
wrote:

In my days in the military I spent a week at a unit training soldiers for
peace keeping duties. Over the mock town was a pylon run and the sound it
made was like heavy rain falling. If they are all like that I wouldn't want
to live near by.


The ones passing near the CPTA were 440kV, and indeed sang quite
loudly. However it was also a very quiet environment (if you ignored
the odd gunshots, explosions and irate SNCO's).

If you wind 1 mile of cable in your garage (as someone did) you can
steal the electricity.
--
Zaax
http://www.ukgatsos.com
  #12   Report Post  
Andrew McKay
 
Posts: n/a
Default Electric pylons... are they noisy?

On Tue, 8 Jul 2003 02:20:21 +0100, zaax wrote:

If you wind 1 mile of cable in your garage (as someone did) you can
steal the electricity.


Doesn't sound like a good deal to me! I have the benefit of high
voltage cables running over my home and potentially inflicting harm on
my family, with free electricity. Or not have the high voltage cables
and have to pay for electricity.

I know which I'd vote for.

Andrew

Do you need a handyman service? Check out our
web site at http://www.handymac.co.uk
  #13   Report Post  
The Natural Philosopher
 
Posts: n/a
Default Electric pylons... are they noisy?

John wrote:

Some are only (!) 132kv. They are local distribution and tend to be quiet.

Don't climb up with your voltmeter! There is usually a notice with the
voltage. Long insulators = higher voltage.

http://users.tinyonline.co.uk/bigh/bigh/pylonof.htm



Even 11KV overheads buzz in damp weather.


  #14   Report Post  
The Natural Philosopher
 
Posts: n/a
Default Electric pylons... are they noisy?

Simon Avery wrote:

"Lionel" wrote:

Hello Lionel


L| We're planning to move soon but noticed there are overhead
L| electric pylons in some parts of the town... health and
L| aesthetic issues aside, we are also concerned about the
L| fizzy and/or buzzing noise they are said to make.


L| Anyone confirm this and suggest at what distance the noise
L| should be inaudible?


Not all pylons are equal.

The big ones do buzz in misty or damp weather, very audibly. Maybe you
can't
hear 'em behind double glazing, I don't know. I DO know it plays merry
hell
with mobile and radio signals. Their buzzing also seems to vary
according to
time of day (I'm guessing load).

Small pylons don't buzz, as a rule.

Overhead power lines (2 or 3 wires, 11 or 33kv) don't buzz,



They do. Just not very much.

Leastways the ones I used to have over the back garden did.

neither
does
overhead LV (240vac, usually strung vertically around here). They do
arc quite
prettily when the wind pushes 'em together though.




  #15   Report Post  
The Natural Philosopher
 
Posts: n/a
Default Electric pylons... are they noisy?

Andrew McKay wrote:

On Tue, 8 Jul 2003 02:20:21 +0100, zaax wrote:


If you wind 1 mile of cable in your garage (as someone did) you can
steal the electricity.


Doesn't sound like a good deal to me! I have the benefit of high
voltage cables running over my home and potentially inflicting harm on
my family, with free electricity. Or not have the high voltage cables
and have to pay for electricity.



'Potentially' inflicting harm...haha. Nice pun.

They are harmless really, but the static is annoying sometimes.

Personaly I like peace and quiet, so I wouldn't. But teh inflicting harm
bit is almost certainly baloney.


I know which I'd vote for.

Andrew

Do you need a handyman service? Check out our
web site at http://www.handymac.co.uk





  #16   Report Post  
Andrew McKay
 
Posts: n/a
Default Electric pylons... are they noisy?

On Tue, 08 Jul 2003 10:24:06 +0100, The Natural Philosopher
wrote:

Personaly I like peace and quiet, so I wouldn't. But teh inflicting harm
bit is almost certainly baloney.


I'm not sure it is possible to draw a conclusion on that. At one time
X-rays were considered safe - people used to do magic shows to
demonstrate their use. Perhaps an extreme example, but any external
influence on the human body could be harmful.

Andrew

Do you need a handyman service? Check out our
web site at http://www.handymac.co.uk
  #17   Report Post  
tony sayer
 
Posts: n/a
Default Electric pylons... are they noisy?

In article , Andrew McKay
writes
On Tue, 08 Jul 2003 10:24:06 +0100, The Natural Philosopher
wrote:

Personaly I like peace and quiet, so I wouldn't. But teh inflicting harm
bit is almost certainly baloney.


I'm not sure it is possible to draw a conclusion on that. At one time
X-rays were considered safe - people used to do magic shows to
demonstrate their use. Perhaps an extreme example, but any external
influence on the human body could be harmful.

Andrew

Do you need a handyman service? Check out our
web site at http://www.handymac.co.uk


Well there is a cottage a few miles from here that sits right underneath
a twin 33 kV line. FWIW over 10 years three occupants there have died
from various cancers...
--
Tony Sayer

  #18   Report Post  
tony sayer
 
Posts: n/a
Default Electric pylons... are they noisy?

In article , John
writes
Some are only (!) 132kv. They are local distribution and tend to be quiet.

Don't climb up with your voltmeter! There is usually a notice with the
voltage. Long insulators = higher voltage.

http://users.tinyonline.co.uk/bigh/bigh/pylonof.htm


Ah great!. I wondered where than site had gone. Just like the American
one the electric pole shrine..a tribute to the lone electric linesman...
--
Tony Sayer

  #19   Report Post  
tony sayer
 
Posts: n/a
Default Electric pylons... are they noisy?

In article , wanderer
writes
"Terry" wrote in message
...
John wrote:

"Lionel" wrote in message
...
Hello,

We're planning to move soon but noticed there are overhead electric
pylons
in some parts of the town... health and aesthetic issues aside, we are
also
concerned about the fizzy and/or buzzing noise they are said to make.

Anyone confirm this and suggest at what distance the noise should be
inaudible?


The buzzing is only the sound of the air molecules being torn apart by

the
electric stress on them and is often accompanied by a blue glow in the
dark. The phenomena is know as corona. the range of the sound depends on
atmospheric conditions to a great extent but I would suggest its a bit

like
living next to a railway line - you soon get used to the sound


Then there are those unsubstantiated stories about people living
near power transmission lines having higher rates of cancer!
Nothing proven or factual AFIK? And that discussion has been
going on for years!


The 'official' line is that nothing has been proved. I worked in the
industry for 35 years, and whilst I would think nothing of wandering around
a major substation, I wouldn't pick a house near a transmission line. I
guess that's personal choice, but I still sometimes get the hairs on the
back of my neck rising when I drive under a 275 or 400kv line. Oh, and BTW,
they're towers, not pylons!)

I understand that all high voltage system fizz/buzz especially in
damp/foggy weather. A rare occurrence in Britain?
If one of those big/long high voltage glass/ceramic insulators
developed a fault (Rare, as I understand it, unless someone
shoots at them etc.) there can be sparks across them or to an
adjacent wire and or the metal or wooden poles. But it's nothing
to worry about. I wouldn't park under/near them though!


I recollect quite by chance parking many years ago under a 275kv line on a
damp and misty morning, waiting for a line crew to turn up - we were
escorting an abnormally high load. I hopped out of the car, and got quite a
belt from induced voltage.





I used to have an old minivan with a long fibre glass aerial thereon .
On damp days there is a 475 kV line near here that U could drive under
and have sparks about a couple of inches long jump from the inner of the
aerial to the vehicle metalwork...

Very low current though!...
--
Tony Sayer

  #20   Report Post  
Succorso
 
Posts: n/a
Default Electric pylons... are they noisy?

Lionel wrote:
Hello,

We're planning to move soon but noticed there are overhead electric pylons
in some parts of the town... health and aesthetic issues aside, we are also
concerned about the fizzy and/or buzzing noise they are said to make.

Anyone confirm this and suggest at what distance the noise should be
inaudible?

Many thanks,

Lionel.




The big jobbies (450Kv) are great fun in extreme weather. "Our" pylons
glow with St Elmo's fire sometimes, during summer thunderstorms. Also,
when encased with ice during snowstorms, they produce some excellent
fireworks for free.

Most fun during thunderstorms though - we have shot several home videos
of the closest pylon getting hit. Does make a BIG bang though!!



  #21   Report Post  
wanderer
 
Posts: n/a
Default Electric pylons... are they noisy?

"Andrew McKay" wrote in message
...
On Tue, 08 Jul 2003 10:24:06 +0100, The Natural Philosopher
wrote:

Personaly I like peace and quiet, so I wouldn't. But teh inflicting harm
bit is almost certainly baloney.


I'm not sure it is possible to draw a conclusion on that. At one time
X-rays were considered safe - people used to do magic shows to
demonstrate their use. Perhaps an extreme example, but any external
influence on the human body could be harmful.


As I said elsewhere, the official line is that nothing has been proved.
There are some reports out possibly from the National Radiological
Protection Board that don't actually say there's no danger, but that there
is no evidence to prove there's any danger from electromagnetic fields,
which, of course isn't quite the same thing. There was also I think a
Swedish report that came out about 10 or 12 years ago that said there was
evidence to prove there was a danger. In the end, I guess you pays your
money and takes your choice depending on your view point!


  #22   Report Post  
Peter Ashby
 
Posts: n/a
Default Electric pylons... are they noisy?

In article ,
"wanderer" wrote:

As I said elsewhere, the official line is that nothing has been proved.
There are some reports out possibly from the National Radiological
Protection Board that don't actually say there's no danger, but that there
is no evidence to prove there's any danger from electromagnetic fields,
which, of course isn't quite the same thing. There was also I think a
Swedish report that came out about 10 or 12 years ago that said there was
evidence to prove there was a danger. In the end, I guess you pays your
money and takes your choice depending on your view point!


Well I can tell you that the effects of magnetic fields on developing
embryos are well documented for one biological effect. TMS shows that
magnetic fields can affect cognition as well. So we know magnetic fields
affect biological systems, the question of course is one of field
strength (and direction) allied with long term exposure.

My wife administered an epidemiology study which measured levels in
homes and sought a correlation with cancers. I can't remember what the
conclusions were, but I'll ask. It was of the 'did the electricity meter
on the other side of the wall from the bed cause my kid's brain tumour?'
type.

Personally, I wouldn't live underneath high tension lines, but then I
earn enough so I don't have to.

Peter

--
Peter Ashby
School of Life Sciences, University of Dundee, Scotland
To assume that I speak for the University of Dundee is to be deluded.
Reverse the Spam and remove to email me.
  #23   Report Post  
wanderer
 
Posts: n/a
Default Electric pylons... are they noisy?

"Peter Ashby" wrote in message
news
In article ,
"wanderer" wrote:

As I said elsewhere, the official line is that nothing has been proved.
There are some reports out possibly from the National Radiological
Protection Board that don't actually say there's no danger, but that

there
is no evidence to prove there's any danger from electromagnetic fields,
which, of course isn't quite the same thing. There was also I think a
Swedish report that came out about 10 or 12 years ago that said there

was
evidence to prove there was a danger. In the end, I guess you pays your
money and takes your choice depending on your view point!


Well I can tell you that the effects of magnetic fields on developing
embryos are well documented for one biological effect. TMS shows that
magnetic fields can affect cognition as well. So we know magnetic fields
affect biological systems, the question of course is one of field
strength (and direction) allied with long term exposure.

My wife administered an epidemiology study which measured levels in
homes and sought a correlation with cancers. I can't remember what the
conclusions were, but I'll ask. It was of the 'did the electricity meter
on the other side of the wall from the bed cause my kid's brain tumour?'
type.


I came across one unusual case quite a few years ago, where a very highly
strung woman was claiming to hear very load humming from the meter / the low
voltage overheads in the street / an 11kv line a couple of fields away / a
(defunct and de-ernergised) 132 kv circuit a couple of miles away. She'd
been to Bristol (?) Uni to have her hearing checked, and had fans running in
her bedroom all night to mask this alleged hum!

In the end we tracked it down to some extractor fans in an abbatoir about
1/4 mile away. Got them to turn off the fans whilst telling her that we were
disconnecting her electricity supply - there was a reason to mislead her.
When she said the noise had disappeared, we could tell her that her
electricity hadn't been turned off, but the fans had. She had become totally
convinced that the problem was an electrical hum, and we had to prove that
it wasn't by leaving her leccy on unbeknowns to her.


  #24   Report Post  
geoff
 
Posts: n/a
Default Electric pylons... are they noisy?

In message , tony sayer
writes
In article , John
writes
Some are only (!) 132kv. They are local distribution and tend to be quiet.

Don't climb up with your voltmeter! There is usually a notice with the
voltage. Long insulators = higher voltage.

http://users.tinyonline.co.uk/bigh/bigh/pylonof.htm


Ah great!. I wondered where than site had gone. Just like the American
one the electric pole shrine..a tribute to the lone electric linesman...


I remember sending him a load of photos of microwave towers I worked on
a few years ago - the word "obsessed" springs to mind

--
geoff
  #25   Report Post  
geoff
 
Posts: n/a
Default Electric pylons... are they noisy?

In message , Peter
Ashby writes


Personally, I wouldn't live underneath high tension lines, but then I
earn enough so I don't have to.


Houses are cheap up in Scotlandshire aren't they
--
geoff


  #26   Report Post  
wanderer
 
Posts: n/a
Default Electric pylons... are they noisy?

"geoff" wrote in message
...
In message , Peter
Ashby writes


Personally, I wouldn't live underneath high tension lines, but then I
earn enough so I don't have to.


Houses are cheap up in Scotlandshire aren't they


Yup, with all that granite around Radon's the problem up there......


  #27   Report Post  
The Q
 
Posts: n/a
Default Electric pylons... are they noisy?

Snip

Well there is a cottage a few miles from here that sits right underneath
a twin 33 kV line. FWIW over 10 years three occupants there have died
from various cancers...
--
Tony Sayer
Considering one in three of us will get cancer in our lifetime the chances

of this happening somewhere in the country are quite high!!!.

Me I've worked in high voltage electronics all my life and believe the risks
are "B.........T" as an example near where I used to live there was a
campaign to stop a mobile phone mast because of the " danger" several
hundred yards away was a major radar station pumping megawatts into the air
for the last 50 years Problems ...NIL.
The High Voltage pylons will suffer from, arcing over the ceramic isolators
in the rain some "mains hum" can be heard occasionally. The wind may make
more noise over the cables, and the pylons may interfere with TV /Radio
reception.

THE Q


  #28   Report Post  
tony sayer
 
Posts: n/a
Default Electric pylons... are they noisy?

In article , Succorso Succorso@
no.spam.here.please.we.are.british.ivy-house.net writes
Lionel wrote:
Hello,

We're planning to move soon but noticed there are overhead electric pylons
in some parts of the town... health and aesthetic issues aside, we are also
concerned about the fizzy and/or buzzing noise they are said to make.

Anyone confirm this and suggest at what distance the noise should be
inaudible?

Many thanks,

Lionel.




The big jobbies (450Kv) are great fun in extreme weather. "Our" pylons
glow with St Elmo's fire sometimes, during summer thunderstorms.


Where are *our* pylons do you mean the UK?..
Also,
when encased with ice during snowstorms, they produce some excellent
fireworks for free.

Most fun during thunderstorms though - we have shot several home videos
of the closest pylon getting hit. Does make a BIG bang though!!



Any of this on the web?..
--
Tony Sayer

  #29   Report Post  
R W
 
Posts: n/a
Default Electric pylons... are they noisy?

Andrew McKay wrote:
On Tue, 8 Jul 2003 02:20:21 +0100, zaax wrote:

If you wind 1 mile of cable in your garage (as someone did) you can
steal the electricity.


Doesn't sound like a good deal to me! I have the benefit of high
voltage cables running over my home and potentially inflicting harm on
my family, with free electricity. Or not have the high voltage cables
and have to pay for electricity.


They only harm your family if they decide to go and climb them (or fly
kite into them etc).

The only reasonably agreed theory behind power lines causing cancer is
that they can cause a static charge in the air around them, this air
then attracts potentially carcinogenic particles from vehicle exhausts
etc which then "hang around" in the air near the lines rather than
falling to the ground, meaning you are more likely to breathe them in.



  #30   Report Post  
R W
 
Posts: n/a
Default Electric pylons... are they noisy?

tony sayer wrote:
In article , Andrew McKay
writes
On Tue, 08 Jul 2003 10:24:06 +0100, The Natural Philosopher
wrote:

Personaly I like peace and quiet, so I wouldn't. But teh inflicting
harm bit is almost certainly baloney.


I'm not sure it is possible to draw a conclusion on that. At one time
X-rays were considered safe - people used to do magic shows to
demonstrate their use. Perhaps an extreme example, but any external
influence on the human body could be harmful.

Andrew

Do you need a handyman service? Check out our
web site at http://www.handymac.co.uk


Well there is a cottage a few miles from here that sits right
underneath a twin 33 kV line. FWIW over 10 years three occupants
there have died from various cancers...


Cancer affects 1 in 4 people in their lifetime so it's not that against
the odds. Not only that but if you're male then you're 95% certain to
get prostate cancer before you reach the age of 100 (assuming you don't
meet your maker for other reasons before that age, of course).





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Default Electric pylons... are they noisy?

"Simon Avery" wrote in message
...
"Dave Liquorice" wrote:


snip

DL| Ours sing, I can't quite make up my mind if it's some
DL| curious midfrequency oscilation in the single phase pole
DL| transformer or just wind induced wire whistle that is
DL| amplified by the pole.


I'd guess wind - never noticed any hum (except from 240vac
transformers under heavy load), and I spent several years working next
to 'em. (Contract tree trimming to maintain the 4m safety zone)


Aeolian (sp?) vibration! I knew of a section of 33/11kv dual circuit that
was in an exposed location on the edge of Salisbury Plain that had the
problem. Even some barbed wire fencing nailed to the 'H' pole sang if the
wind was in the right quarter! As a generalisation, however, I've never come
across it on lv systems.


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