New South Wales Electricity Transmission Authority v Kater

The New South Wales Electricity Transmission Authority (the Authority) appealed to the New South Wales Court of Appeal against a decision of the Supreme Court of New South Wales. The dispute concerned the Authority's liability for damage caused to the respondent's property, Mr. Kater, by the escape of electricity from a high-voltage transmission line. Mr. Kater had claimed damages for the loss of his sheep, which were electrocuted when they came into contact with a fence that had become energised due to a fault in the Authority's transmission line.

The central legal issue before the Court of Appeal was whether the Authority had discharged its duty of care to prevent the escape of electricity from its transmission lines, thereby avoiding liability for the damage suffered by Mr. Kater. Specifically, the court had to consider whether the Authority had taken all reasonable precautions to ensure the safety of its infrastructure and to prevent foreseeable harm to neighbouring properties.

The Court of Appeal found that the Authority had failed to discharge its duty of care. The court applied the principles of negligence, emphasizing that the Authority, as the operator of high-voltage electricity transmission lines, owed a stringent duty to take all reasonable steps to prevent the escape of electricity. The evidence indicated that the fault in the transmission line, which led to the energising of the fence, was a foreseeable event. The Authority's system of inspection and maintenance was found to be inadequate, failing to identify and rectify the defect that caused the escape of electricity. Consequently, the Authority was held liable for the loss of Mr. Kater's sheep.