Reasons for power outages

The 4 most common reasons for power outages in our province, include:

  1. Adverse weather, lightning, tree contacts (35 per cent of outages from 2010–2015)
  2. Equipment failure, adverse environment (34 per cent of outages from 2010–2015)
    • Downed power lines.
    • A broken or fallen pole, or old or aging infrastructure.
    • A failure with our equipment such as a faulted transformer, failed line fuse or a problem at one of our substations.
    • Equipment failure due to technical problems within the equipment or abnormal environmental conditions (fire, flood, corrosion).
  3. Foreign interference (15 per cent of outages from 2010–2015)
    • Raccoons, squirrels, or other animals can cause short circuits by contacting power lines or other equipment.
    • Birds landing on power lines or transformers can trip fuses.
    • Objects, such as shoes or kites, hanging from power lines.
    • Vehicle accidents involving power lines, poles or other equipment.
    • Equipment, such as a crane at a construction site, coming into contact with a power line.
    • Excavation or digging by contractors or the public without proper line locations and clearances can cut underground wires.
  4. Unknown, other (11 per cent of outages from 2010–2015)
    • No apparent cause or reason can be determined.