Power was cut to thousands of homes, trains were delayed, and rail warning systems went haywire during a widespread outage in Masterton yesterday.
Dean Stevenson, Powerco acting network operations manager, said an equipment fault was blamed for the outage, which struck soon after 10am yesterday when supply was lost to the Akura, Awatoitoi and Tinui substations in the wider Masterton district.
Homes and businesses that bore the brunt of the mid-morning outage were located in Bruce Rd, Kaipororo Rd, Kakaumu Rd, Kopuaranga, Masterton, Masterton north, Matahiwi Rd, Mikimiki, Mt Bruce, Opaki, Paierau Rd, Rangitumau, Solway, Upper Manaia Rd, and Upper Plain Rd.
Mr Stevenson said power was restored about a half hour later to the 4200 homes and premises that had lost power in Wairarapa and Tararua.
An investigation has been launched into the cause of the fault.