Tenaga Nasional Berhad v Quah Lian Wua

Case Significance

Illustrates that an electricity supplier claiming loss of revenue for meter tampering under the Electricity Supply Act 1990 must prove the tampering and loss, and that an appellate court will not disturb a trial judge's findings absent a compelling reason.

This High Court decision, sitting in its appellate jurisdiction, concerns an electricity supplier's appeal against the dismissal of its claim for loss of revenue alleged to arise from meter tampering. The appellant, Tenaga Nasional Berhad, had sued the respondent consumer in the Sessions Court for a sum said to represent lost revenue over a period of some fifty-nine months, on the basis of alleged unauthorised tampering and electricity theft at the respondent's premises, invoking section 37 of the Electricity Supply Act 1990. After hearing several witnesses for the supplier and one for the consumer, the Sessions Court Judge held that the supplier had failed to prove the alleged tampering or the claimed loss on a balance of probabilities, finding that the electricity meter was intact and functioning properly and that the tapping point was located within the supplier's own infrastructure and management rather than under the consumer's control. The supplier appealed. The question for the High Court was whether the Sessions Court Judge had erred in her findings such that appellate intervention was warranted. Applying the settled principle that an appellate court is slow to interfere with findings of fact and assessments of witness credibility made by a trial judge who had the advantage of hearing and observing the witnesses, the court found no compelling reason to disturb the decision: the trial judge had carefully evaluated the evidence, correctly applied the law, and made findings supported by the record, including that significant evidentiary gaps undermined the quantum claim. Holding the appeal to be entirely without merit, the court dismissed it with costs of RM10,000.00 and upheld the Sessions Court's decision. The judgment illustrates the evidential burden on a supplier alleging meter tampering and the restraint appellate courts show over concurrent findings of fact. The court's approach underscores that the burden of proving both the fact of tampering and the quantum of the resulting loss lies squarely on the supplier, and that inferences of theft cannot substitute for cogent proof connecting the consumer to any interference with the meter.