There were also concerns about a strong, blustery wind, the fires' proximity to a plantation forest, and the possibility that the downed line was touching a fence.
Two fire engines from Paihia and one from Kerikeri responded, along with Kaikohe-based Rural Fire from and two Salt Air helicopters from Paihia.
A Top Energy crew got to work repairing the line as soon as the fire was out.
Top Energy networks manager David Worsfold said the line was turned off as a safety precaution as soon as the company was notified by the Fire Service.
The shutdown cut power to Haruru Falls and Waitangi, including the Copthorne Hotel.
Later the company was able to backfeed power to Waitangi so by 4pm, only 92 customers — all in the Haruru Falls area — were still without power.
Mr Worsfold said there was no indication at edition time yesterday why the line had come down. The linemen doing the repairs would report back what they had found, he said.