It's only a matter of time until either a thief, or an innocent member of the public, is injured or killed because of these actions."
Powerco's General Manager of Health and Safety, Julie McAvoy, said Powerco's priority was to make its electricity network safe following any thefts, with repairs being made as soon as any damage is discovered.
"We take public safety incidents extremely seriously.
We encourage members of the public to notify us immediately if they see anything on our electricity networks that they are concerned about regarding safety, such as wires that have noticeably been cut or wires hanging low."
Powerco's emergency number is 0800 27 27 27.
Information can also be provided anonymously via Crimestoppers on 0800 555 111.