Accidents don't just happen, they are caused by lack of care or knowledge. Farms are subject to the 'Health and Safety at Work etc. Act 1974' and the 'Electricity at Work Regulations'. No-one should put themselves or others at risk by their acts and omissions.
Farmers have the responsibility to ensure their electrical systems are safe.
If you are not qualified yourself to wire or maintain an installation, then you should employ someone who is. Farm Energy Centre has published a comprehensive safety hand-book with detailed guidance on all aspects of safety from overhead cables to wiring up plugs and sockets. Farmers' legal responsibilities are spelt out. The book is easy to read and contains many illustrations and photos. It is vital reading for everyone who works in farming and horticulture.