Shortly after 9 a.m. on April 15, the 49-year-old self-employed man, who was hired by TRJ Signman in Brechin for the Beaverton job, was removing Plexiglas from a plaza sign at 11 Beaver Ave.
, said Belinda Sutton, a spokesperson for the Ministry of Labour.
The man was on a ladder and "lost his footing or balance and rocked backwards" into the wires, said Durham police Sgt. Paul McCurbin, citing a witness report.
The victim's co-worker witnessed the incident and called 911.
The victim was pronounced dead at the scene. Police have not released his name.
The Ministry of Labour is investigating.