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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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OT Electrocution
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OT Electrocution
En el artículo
roups.com, harry escribió: http://www.huffiBLAM I Can't Stand Those Frigging American Newspapers And Websites That Unnecessarily Capitalise The First Letter Of Every Word In The Headline. It Looks So Fecking Stupid. -- (\_/) (='.'=) (")_(") |
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OT Electrocution
In message , Mike Tomlinson
writes En el artículo roups.com, harry escribió: http://www.huffiBLAM I Can't Stand Those Frigging American Newspapers And Websites That Unnecessarily Capitalise The First Letter Of Every Word In The Headline. It Looks So Fecking Stupid. I think Harry's realised that the only way he doesn't get jumped on for his stupid remarks is just to post irrelevant crap and xenophobic quotes -- geoff |
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OT Electrocution
On Tue, 21 Feb 2012 09:49:16 -0800 (PST), harry
wrote: http://www.huffingtonpost.co.uk/2012...26pLid%3D97334 AIUI the safest place to be when your vehicle is in contact with electricity is inside the vehicle. That presupposes that the said vehicle is not on fire of course. The piece implies that he was electrocuted inside the vehicle, I wonder if that is true. -- Graham. %Profound_observation% |
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OT Electrocution
On 21/02/2012 20:40, Graham. wrote:
On Tue, 21 Feb 2012 09:49:16 -0800 (PST), wrote: http://www.huffingtonpost.co.uk/2012...26pLid%3D97334 AIUI the safest place to be when your vehicle is in contact with electricity is inside the vehicle. That presupposes that the said vehicle is not on fire of course. The piece implies that he was electrocuted inside the vehicle, I wonder if that is true. No it is physically impossible. The car body would behave like a Faraday cage - although modern composites much less so than steel but a metallic paint on carbon composite would be close enough. There are some pretty good stage artists that do clever shows based on a superb knowledge of what is safe with large currents flowing on the exterior. An appropriate ArcAttack for the UK - Dr Who theme performed in part by a stunt man in chain mail stood between two MV class tuned telsa coils. http://www.youtube.com/watch?v=Pdrqd...eature=related They caused quite a stir when they first appeared on Americas Got Talent as the judges really didn't know what to make of it. http://www.youtube.com/watch?feature...&v=KbS50_65UjI They got a lot more showmanship into their act by the semifinals. The unfortunate footballer would be electrocuted when he had one foot on the ground and a hand still touching the metal body of the car. The others presumably didn't touch anything conductive as they got out OK. -- Regards, Martin Brown |
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OT Electrocution
On Tue, 21 Feb 2012 21:17:46 +0000, Martin Brown
wrote: On 21/02/2012 20:40, Graham. wrote: On Tue, 21 Feb 2012 09:49:16 -0800 (PST), wrote: http://www.huffingtonpost.co.uk/2012...26pLid%3D97334 AIUI the safest place to be when your vehicle is in contact with electricity is inside the vehicle. That presupposes that the said vehicle is not on fire of course. The piece implies that he was electrocuted inside the vehicle, I wonder if that is true. No it is physically impossible. The car body would behave like a Faraday cage - although modern composites much less so than steel but a metallic paint on carbon composite would be close enough. There are some pretty good stage artists that do clever shows based on a superb knowledge of what is safe with large currents flowing on the exterior. An appropriate ArcAttack for the UK - Dr Who theme performed in part by a stunt man in chain mail stood between two MV class tuned telsa coils. http://www.youtube.com/watch?v=Pdrqd...eature=related They caused quite a stir when they first appeared on Americas Got Talent as the judges really didn't know what to make of it. http://www.youtube.com/watch?feature...&v=KbS50_65UjI They got a lot more showmanship into their act by the semifinals. The unfortunate footballer would be electrocuted when he had one foot on the ground and a hand still touching the metal body of the car. The others presumably didn't touch anything conductive as they got out OK. That's what I thought, and that's what happened; he tried to exit the vehicle, but if he could have hung on for a few more seconds he might have been OK. Full account here, http://www.scotcourts.gov.uk/opinions/2012FAI17.html Read from about Para 83 -- Graham. %Profound_observation% |
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OT Electrocution
On Feb 21, 9:17 pm, Martin Brown
wrote: They got a lot more showmanship into their act by the semifinals. and thankfully hid the headbanging geek on the organ turned upto 11.... Jim K |
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OT Electrocution
In article ,
Martin Brown writes: The unfortunate footballer would be electrocuted when he had one foot on the ground and a hand still touching the metal body of the car. The others presumably didn't touch anything conductive as they got out OK. There used to be a set of accident pictures on the web with something not dissimilar. A car hit a reinforced concrete pole (of the type commonly found in some other contries, but not common in UK). The driver was not hurt, opened the door, put a foot out, and was prompty electrocuted by the high voltage (don't recall what voltage, but the lines were many thousands of volts). Driver's legs ended up like a lump of charcoal which also burned out part of the car. You had to look carefully to see what had happened, and the photographer had captured all the relevant evidence. When the car hit the pole, the pole stayed upright and the HV wires didn't come down. However, one of the wires came off its insulator and was resting on the metal cross-arm, so the cross-arm was now live. At the bottom of the pole, the car had chipped off some concrete and was resting on one of the internal metal reinforcing bars. There was obviously a connection between the metal cross-arm and the rebar in the concrete. This left the car sitting at many thousands of volts, which was OK until the driver tried to step out. It's interesting to think what you should do in a scenario where your car body is connected to high voltage. You can't sit there for too long as the tyre rubber conducts high voltage well enough to slowly catch fire (find a video of a digger or cherry picker hitting HV cables to see this). You could jump out of the car so there's never a connection through you between the car and ground. This then exposes you to a secondary risk - that there's a potential across the ground which is large enough to bring you down with your first stride. So you need to jump out landing feet together (as though tied), and then jump away in a similar style, or hop, but falling over in the process could be lethal. Anyway, well worth thinking through before it happens to you. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
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On Wed, 22 Feb 2012 17:25:44 +0000, Graham. wrote:
It's interesting to think what you should do in a scenario where your car body is connected to high voltage. You could jump out of the car so there's never a connection through you between the car and ground. Reading the Sheriff's report in this case, it seems that the difference between life and death might be to take an educated guess at the breaker re-closure sequence, and in particular, to try to determine when it has given up retrying. I would think that the number of people who even know what a re-closure sequence is will be a very small percentage of the population. Those who get their supply by an overhead network may have wondered why the lights go off and then come back on again and either stay on or extinguish again may have picked up the reason,but my other half did not know and neither did our neighbour when the subject came up once following a windy night. A lot of people think it is just some operator switching supplies somewhere if they actually think about it all. And even if somebody is aware in the immediate aftermath of such an accident would they be in the right frame of mind to remember such a thing . G.Harman |
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OT Electrocution
En el artículo , Andrew Gabriel
escribió: So you need to jump out landing feet together (as though tied), and then jump away in a similar style, or hop, but falling over in the process could be lethal. Anyway, well worth thinking through before it happens to you. I doubt anyone does much "thinking through" in a situation like that. -- (\_/) (='.'=) (")_(") |
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OT Electrocution
Andrew Gabriel :
It's interesting to think what you should do in a scenario where your car body is connected to high voltage. You can't sit there for too long as the tyre rubber conducts high voltage well enough to slowly catch fire (find a video of a digger or cherry picker hitting HV cables to see this). You could jump out of the car so there's never a connection through you between the car and ground. This then exposes you to a secondary risk - that there's a potential across the ground which is large enough to bring you down with your first stride. So you need to jump out landing feet together (as though tied), and then jump away in a similar style, or hop, but falling over in the process could be lethal. Anyway, well worth thinking through before it happens to you. My thoughts are leading me towards a dive into a forward roll. Sixty years ago I could have done it. :-( -- Mike Barnes |
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OT Electrocution
Andrew Gabriel wrote:
In article , Martin Brown writes: The unfortunate footballer would be electrocuted when he had one foot on the ground and a hand still touching the metal body of the car. The others presumably didn't touch anything conductive as they got out OK. There used to be a set of accident pictures on the web with something not dissimilar. A car hit a reinforced concrete pole (of the type commonly found in some other contries, but not common in UK). The driver was not hurt, opened the door, put a foot out, and was prompty electrocuted by the high voltage (don't recall what voltage, but the lines were many thousands of volts). Driver's legs ended up like a lump of charcoal which also burned out part of the car. You had to look carefully to see what had happened, and the photographer had captured all the relevant evidence. When the car hit the pole, the pole stayed upright and the HV wires didn't come down. However, one of the wires came off its insulator and was resting on the metal cross-arm, so the cross-arm was now live. At the bottom of the pole, the car had chipped off some concrete and was resting on one of the internal metal reinforcing bars. There was obviously a connection between the metal cross-arm and the rebar in the concrete. This left the car sitting at many thousands of volts, which was OK until the driver tried to step out. It's interesting to think what you should do in a scenario where your car body is connected to high voltage. You can't sit there for too long as the tyre rubber conducts high voltage well enough to slowly catch fire (find a video of a digger or cherry picker hitting HV cables to see this). You could jump out of the car so there's never a connection through you between the car and ground. This then exposes you to a secondary risk - that there's a potential across the ground which is large enough to bring you down with your first stride. So you need to jump out landing feet together (as though tied), and then jump away in a similar style, or hop, but falling over in the process could be lethal. Anyway, well worth thinking through before it happens to you. There is planning ahead and then there is "planning ahead". -- Adam |
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OT Electrocution
Graham. wrote:
On Tue, 21 Feb 2012 09:49:16 -0800 (PST), harry wrote: http://www.huffingtonpost.co.uk/2012...26pLid%3D97334 AIUI the safest place to be when your vehicle is in contact with electricity is inside the vehicle. That presupposes that the said vehicle is not on fire of course. The piece implies that he was electrocuted inside the vehicle, I wonder if that is true. No it doesn't. It says he was found on the ground beside the vehicle, which was on fire. Tim |
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OT Electrocution
On Tue, 21 Feb 2012 20:40:44 +0000, Graham. wrote:
On Tue, 21 Feb 2012 09:49:16 -0800 (PST), harry wrote: http://www.huffingtonpost.co.uk/2012...26pLid%3D97334 AIUI the safest place to be when your vehicle is in contact with electricity is inside the vehicle. That presupposes that the said vehicle is not on fire of course. Maybe 20 years ago a crane driver hit the overhead lines not too far away from a nuclear power station in the UK. The tyres exploded and it sunk partly into a large crater under each wheel. As there was high speed auto reclose on this overhead line, the circuit was re-energised and the crane got another hit just 500ms later. Luckily he was still in the cab. He then climbed down and made it away from the crane before a final automatic attempt to re-energise was made a few 10's of seconds later. He survived, the crane and the road were, to put it mildly wrecked. There were no indications as to the state of his underwear -- |
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