In a recent case, three companies were fined following the death of a worker who was electrocuted when a pole he was carrying came into contact with an overhead power cable.

About five people are killed every year in accidents involving overhead power lines (OHPLs). This is a particular problem in construction and agricultural work. Machinery such as tipping trailers, mobile elevating work platforms (MEWPs) and boom sprayers are often involved. It is not necessary for direct contact with the power cable to be made. High voltage electricity can “Flash Over” when machinery or equipment gets close to overhead lines.

The majority of incidents involve high voltage lines supported on wooden poles. However, it would be unwise to ignore the dangers of other power cables such as those supported on steel poles, concrete structures or steel towers.

To prevent such incidents, it may be possible to have the power switched off. However, the owners will have to be given sufficient notice. If this is not possible the owners may be able to provide information about the safe working distance from the cables remembering to take account of the possibility of flash over.

As part of the planning procedure for work near overhead power lines, the local electricity company or the National Grid should be consulted. They will be able to offer information about precautions and safe working procedures to be followed when working near power lines. Such information will usually be provided free of charge.

It is important that you find out about the maximum height and vertical reach of machinery to be used beneath power lines, that you are aware of the routes of all overhead lines in the area and that you have information on the maximum working height permitted under each span of the overhead line.

In cases where a significant risk has been identified, it would be sensible to discuss the situation with the electricity company. It may be possible to identify alternative access points and routes – this may be the most convenient option. An alternative option may be to divert the route of the line or even bury it.

The erection of barriers or goalposts will ensure that machines that have to pass beneath the lines can be limited to a safe height. This option is ideally suited to gateways and traffic routes and tracks.

Everybody who is required to work near overhead power lines with machinery or equipment must be informed of the dangers, the precautions to follow and what to do if they contact a power line.

Contractors and visitors to the site are especially at risk. They should be informed of the location of the lines and the precautions they need to take. The routes of the lines can be marked with safety signs to warn all visitors of the dangers.

If there is an accident

Never touch an overhead line – even if it has been brought down or fallen NEVER ASSUME LINES ARE DEAD

When a machine is in contact with an overhead line, electrocution is possible if anyone touches the machine and the ground simultaneously. Stay in the machine lower any raised parts in contact or drive the machine out of the lines if possible

If it is necessary to get help or because of fire, jump as far as you can from the machine without touching any wires or the machine.

Get the electricity company to disconnect the supply. Even if the line appears dead, do not touch it. Automatic switching may reconnect the power.

For further advice and information, contact your local electricity company.