Helicopters will be taking to Macarthur skies in the coming weeks to identify any potential bushfire risks posed by TransGrid towers and powerlines.
The annual safety inspections will also include an assessment of the condition of the network.
The inspections will begin on July 16.
A specialist team will check more than 13,000 kilometres of transmission line and infrastructure across the state.
The team will check for things like vegetation encroaching on power lines and other maintenance issues.
TransGrid customer engagement manager Darren Clarke said the checks were vital.
“These annual safety checks are an important part of our comprehensive maintenance program to ensure the transmission network is safe for our community and staff,” he said.
“Residents across the region may see low-flying helicopters moving along our transmission lines.”