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OVERHEAD POWER LINES
DANGER!
It cannot be stressed enough the dangers involved when working in the vicinity of
overhead power cables. Some of our machines are capable of reach in excess of 8 metres
(26') therefore they have the potential to well exceed, by possibly 3 metres (9' 9"), the
lowest legal minimum height of 5.2 metres from the ground for 11,000 and 33,000 volt
power lines. Remember electrocution can occur without actually coming into contact with a
power line as electricity can 'flash over' when machinery gets close to it.
Before working in areas where overhead power lines are in close proximity the following
steps must be observed:
• Find out the maximum height and maximum vertical reach of your machine.
• Find out the operating voltage of the power lines in the work area - Contact your local
electricity company and/or National Grid Company who will be able to advise you on
the operating voltage and safe minimum clearance distance for working.
• Always ensure the safe minimum clearance recommendation is obeyed and work with
extreme caution at all times.
• If doubt exists do not work in the area – never risk the safety of yourself or others.
Emergency Action for Accidents Involving Electricity
Never touch an overhead line - even if it has been brought down by machinery, or has
fallen. Never assume lines are dead.
When a machine is in contact with an overhead line, electrocution is possible if anyone
touches both the machine and the ground. Stay in the machine and lower any raised parts
in contact or drive the machine out of the lines if you can.
If you need to get out to summon help or because of fire, jump out as far as you can
without touching any wires or the machine - keep upright and away.
Get the electricity company to disconnect the supply. Even if the line appears dead, do not
touch it - automatic switching may reconnect the power.
Further information and leaflets on this and other agricultural safety subjects are available on the
'Health & Safety Executive' website at the following address:
www.hse.gov.uk/pubns/agindex.htm
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