IET logo
 
IET
Decrease font size
Increase font size
Topic Title: Shocking images
Topic Summary: 11kv cable drilled through
Created On: 07 February 2013 09:27 PM
Status: Post and Reply
Linear : Threading : Single : Branch
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 07 February 2013 09:27 PM
User is offline View Users Profile Print this message


Avatar for gel.
gel

Posts: 186
Joined: 13 February 2005

See
Click here

-------------------------
Gel__Big Brother is here
 07 February 2013 10:13 PM
User is offline View Users Profile Print this message


Avatar for slittle.
slittle

Posts: 3487
Joined: 22 November 2007

Tragic but the usual rubbish reporting.

Million watts of power ?????????

Perhaps a CAT would have saved him an awful lot of pain and suffering


Stu
 07 February 2013 11:52 PM
User is offline View Users Profile Print this message



alancapon

Posts: 5761
Joined: 27 December 2005

I agree, the figures don't appear to stack up. It would not be unusual to limit earth fault current to 1000A on an HV system, as this should be sufficient to operate the protection without damaging the cable too much. Assuming the jack-hammer went phase to earth without developing to the other phases, this would give the maximum energy in the initial flash of just under 6.5MW. Obviously with the phase to earth voltage dropping due to the short, the ongoing energy in the arc will be considerably less.

Regards,

Alan.
 08 February 2013 01:00 AM
User is offline View Users Profile Print this message



rogersmith7671

Posts: 886
Joined: 04 November 2004

Quote(from the article);

Northgate Vehicle Services pleaded guilty to breaching health and safety regulations by failing to inform the main contractor of the underground cables.
A few more like this and proper corporate responsibility will be firmly established. Hope the guy gets better soon.
Regards
 08 February 2013 06:39 AM
User is offline View Users Profile Print this message


Avatar for ebee.
ebee

Posts: 5681
Joined: 02 December 2004

It also says he was "Electrocuted".
Clearly not as to be electrocuted you need to be dead

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik
 08 February 2013 08:15 AM
User is offline View Users Profile Print this message



broadgage

Posts: 1283
Joined: 07 August 2007

I think that there could have been a million watts available.
A kilowatt is a thousand watts, and a megawatt is a thousand kilowatts, so one megawatt is a million watts.

These days the term electrocuted seems to be used to mean "receive an electric shock" rather than older, perhaps the proper meaning of "being killed by an electric shock"
 08 February 2013 08:32 AM
User is offline View Users Profile Print this message


Avatar for tomgunn.
tomgunn

Posts: 3223
Joined: 25 May 2005

Originally posted by: ebee

It also says he was "Electrocuted".

Clearly not as to be electrocuted you need to be dead



Errr? I've electrocuted many times - hahaha! Bloody hurts and I aint dead yet - when I woz a lad - I used the bottom of a TP&N industrial dis board to heave myself up and touched about every terminal at once - ahhhhhhhhhh!

Oh well - hey ho! I'm still here!

Whats the worst shock anyone on heres had, ( if you're still alive? ).

Tom

-------------------------
Tom .... ( The TERMINATOR ).

handyTRADESMAN ... haha

Castle Builders

Why did Nick Clegg cross the road? Because he said he wouldn't!

I can resist anything..... except temptation! ( Karl Gunn ).
 08 February 2013 08:41 AM
User is offline View Users Profile Print this message


Avatar for ebee.
ebee

Posts: 5681
Joined: 02 December 2004

Tom Lad,
Electrocution is a contraction of two words.

Electro & Execution.

You got to be dead to qualify as "Electrocuted"

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik
 08 February 2013 09:13 AM
User is offline View Users Profile Print this message



oshta

Posts: 25
Joined: 30 January 2013

Originally posted by: ebee
Tom Lad,

Electrocution is a contraction of two words.

You got to be dead to qualify as "Electrocuted"

Indeed.
https://www.google.co.uk/search?hl=en&q=electrocution+define

Unlike getting a large shock, which does not have to end in death, and hence my or maynot be electrocution.
 08 February 2013 10:59 AM
User is offline View Users Profile Print this message



ArthurHall

Posts: 735
Joined: 25 July 2008

When you hit an HV cable you dont normaly get a shock. You get burnt by the flash. His poor guys injurys are burns to the skin. Severe shocks tend to burn internaly.
 08 February 2013 03:11 PM
User is offline View Users Profile Print this message


Avatar for tomgunn.
tomgunn

Posts: 3223
Joined: 25 May 2005

Originally posted by: ebee

Tom Lad,

Electrocution is a contraction of two words.



Electro & Execution.



You got to be dead to qualify as "Electrocuted"




Tom

-------------------------
Tom .... ( The TERMINATOR ).

handyTRADESMAN ... haha

Castle Builders

Why did Nick Clegg cross the road? Because he said he wouldn't!

I can resist anything..... except temptation! ( Karl Gunn ).
 08 February 2013 03:40 PM
User is offline View Users Profile Print this message


Avatar for ebee.
ebee

Posts: 5681
Joined: 02 December 2004

Oh all right then

ELECTRI cal

&

Exe CUTED

If yer not dead you ain`t been electrocuted (the "I" becomes an "o" )
just been shocked and survived it.


Imagine if we said "Harry was killed so much that he were very nearly dead"

If he were killed he would be dead.

If he were alive he were not dead but was say perhaps assaulted

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik
 08 February 2013 05:28 PM
User is offline View Users Profile Print this message


Avatar for tomgunn.
tomgunn

Posts: 3223
Joined: 25 May 2005

Originally posted by: ebee

Oh all right then



ELECTRI cal



&



Exe CUTED



If yer not dead you ain`t been electrocuted (the "I" becomes an "o" )

just been shocked and survived it.





Imagine if we said "Harry was killed so much that he were very nearly dead"



If he were killed he would be dead.



If he were alive he were not dead but was say perhaps assaulted


Eloquently put!

Tom ( not dead yet - feel like it - but not quite! ).

-------------------------
Tom .... ( The TERMINATOR ).

handyTRADESMAN ... haha

Castle Builders

Why did Nick Clegg cross the road? Because he said he wouldn't!

I can resist anything..... except temptation! ( Karl Gunn ).
 08 February 2013 05:55 PM
User is offline View Users Profile Print this message


Avatar for rocknroll.
rocknroll

Posts: 8838
Joined: 03 October 2005

Now we are running into quantum physics here, was he electrocuted dead or was he electrocuted alive, Oh No!!! not the cat again.

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------
 08 February 2013 05:57 PM
User is offline View Users Profile Print this message



dlane

Posts: 690
Joined: 28 September 2007

The energy in the pressure wave of an arc decreases with time but the heat energy is proportional to the duration of the arc.

Most of the severe burns form arc flash incidents are classified as secondary burning and are not directly from the arc itself. They caused by the arc igniting the clothing which continues to burn after the victim has moved away from the blast area. If the clothing is cotton it burns but polyester and other man-made fibres melt and stock to the skin.

Hence the recommendations for wearing flame resistant clothing that doesn't melt and extinguishes after being removed from the heat source.

Kind regards

Donald Lane
 08 February 2013 06:42 PM
User is offline View Users Profile Print this message


Avatar for sparkingchip.
sparkingchip

Posts: 5974
Joined: 18 January 2003

A guy I used to work with did the same thing some years ago, jack hammered through a HV cable in Worcester.

He was lay in casualty at the hospital and the sister came over to say his gaffer had just phoned to ask if he would be OK to go back and fill the hole in, or would he have to get someone else to do it?

Andy
Statistics

See Also:



FuseTalk Standard Edition v3.2 - © 1999-2014 FuseTalk Inc. All rights reserved.