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Homes in Avonhead, Broomfield, Burnside, Hyde Park, Ilam, Russley and Upper Riccarton were affected.
At 7.30am the temperature in Christchurch was -1 deg C, the MetService says.
Power was cut to the homes from about 6.30am.
An Orion spokesperson told Chris Lynch Media a cable fault was the cause of the power cut.
“All properties have now been restored.”
About 900 properties had power restored by about 8am. The power was back on at the remaining homes by about 9am.
Orion described the outrage as "unplanned".
