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Posted By seamus
Hello Everyone,
What is the best advice to give to lorry driver in the construction industry, regarding lorry, or some other machine making contact with an overhead power line? Do I say to the driver stay in the cab and ring for help,blow hooter etc or jump. Some training slides state for the driver to jump, but is there not a danger here of the driver getting electrouted if s/he lands near the lorry after the jump. Can the electricty not jump on to the driver from the cab when s/he is earthed to the ground. I am assuming the tyres are insulating the truck body from the ground.
In addition some drivers may not be able to jump due to their current medical condition. Also would it make any difference if the lorry was in a pool of water at the time.
I know the driver should check for overhead power lines etc, but I am concerned on the correct procdeure if contact is made with an overhead power line. The voltage in the power line could be high or even extra high, the driver will have no way of knowing, or it could even be turned off before by the electricity supply company.
Thank you all for any advice.
Seamus
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Posted By RP
I would hope that all construction sites are managed to prevent contact with overhead lines, however...
Plant Operator handbooks advise that the driver/operator stay in the cab as the tyres are rubber compound and will insulate from the risk of electrocution. Should the kit be on fire for instance the advice than is to jump clear. The danger being holding onto the vehicle body and the ground at the same time, this would make a direct earth contact
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Posted By David Bramall
Totally agree with the last response. If possible stay in the vehicle, if imminent danger (fire ...) jump well clear dont touch body of vehicle.
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Posted By seamus
Thank you both for your quick response.
I myself felt it was also safer to stay in the lorry, but one of the slides of a training prog I may have to run, advises the driver to jump clear. I was concerned that it requires further clarfication.
If there is a fire the driver may have to jump.
Of course the main point I will give is that there should be no tipping near any power lines, and there should be no power lines at all if possible.
Be as critical as you like, I feel it is important that I give the right message.
Thank you
Seamus
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Posted By Chris G
If you look back at past episodes of top gear. They put Hammond in a VW Polo / Golf? in a very large spark generator used for testing pylon insulators just to show that cars / vans etc are basic faraday cages and can protect against electricity.
Chris
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Posted By Chris121 Extract taken from http://www.hse.gov.uk/pubns/indg389.pdf18 If a machine or its attachments comes into contact with an OHPL, it could be fatal for anyone who touches the machine. Do not rely on rubber tyres or rubber-soled boots for protection - they may not insulate against a highvoltage shock. Tyres can burst into flames and boots can be destroyed. Keep clear The driver of a vehicle which comes into contact with OHPLs will usually remain safe in the cab of the vehicle. People are at risk if they make contact with the vehicle and earth. Do not touch the vehicle or anything attached to it. Shock horroafe working near overhead power lines in agriculture Get help You, or someone else, should contact the electricity company and ask them to disconnect the power immediately. If you have a mobile phone or CB radio, use that. You should have the electricity company’s telephone number taped into the cab. Jump! If you have to leave the cab, jump well clear so that no contact is made between you and the vehicle. Land on your feet, if you can, and RUN! The line could become live again and you could still be close enough to be electrocuted.
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Posted By seamus
Thanks guys
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