A 37-year-old worker standing on an elevated platform of a construction vehicle died two hours after the truck hit two overhead power cables.
Standing on the platform when the vehicle is in motion is understood to be a violation of the safety work guidelines issued by the Labour Department.
The vehicle was traveling toward Fan Ling along Tai Wo Service Road West when it hit the power lines near Nam Wa Po in Tai Po at around 11.15pm on Sunday.
Chan Siu-tin, father of a two-year-old son, was cleaning street lights.
He was electrocuted and suffered a severe head injury after the truck came into contact with the overhead power cables.
Police said the platform of the vehicle apparently rammed into the power cables when approaching Nam Wa Po, and Chan, who was working on the lift platform, was found unconscious inside.
Chan was rushed to Prince of Wales Hospital in Sha Tin and was declared dead at 1.04am. An autopsy will be carried out to ascertain the cause of death.
The driver, 35, passed a breathalyzer test.
Before operating an elevated work platform, the operator should ensure that it is devoid of any workers and shouldn't move.
They should also make sure the platform is lowered to the cradle position before it is transported, according to the department's safety guidelines
They also suggest that the operator should maintain a safe distance from overhead cables, obstacles, debris, holes, depressions, ramps and other hazards.
The department said it immediately deployed staff to the scene after receiving a report of the incident, and an investigation has been conducted to determine the cause of Chan's death.
The Association for the Rights of Industrial Accident Victims is trying to contact Chan's family to offer its assistance.