The lorry, belonging to Hazelton Homes (Midlands) Ltd, was delivering stone at Old Hall Close, Cottesmore, on 28 March 2012 when the raised tipper body struck the power lines above, bringing them to the ground.
The strike caused a power cut to 11 homes nearby which were without electricity for three hours.
The incident was investigated by the Health and Safety Executive (HSE), which prosecuted the company at Leicester Magistrates' Court.
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Magistrates were told that Hazelton Homes (Midlands) Ltd of Rushton, Kettering, failed to make sure that suitable warning signs for vehicles and suspended protections were provided.
However, the court also heard that two and a half weeks before the incident, the company's quantity surveyor warned about the dangers of overhead power lines and the need for barriers and warning signs.
HSE found the power lines had not been made dead or redirected away from the access road. Warning signs and suspended protections had not been erected and there were no procedures in place for receiving deliveries.
When HSE inspectors re-visited the site on 6 November 2012, they found the signs warning of the presence of overhead power lines had been removed, as well as the goalpost, which sits across the road on the entrance to the site, warning of a height restriction, on one side of the overhead power lines.
Hazelton Homes (Midlands) Ltd pleaded guilty to breaching regulation 34(2) (c) of the Construction (Design and Management) Regulations 2007 and was fined £8,000 with costs of £4,214.
(CD/JP)
