The Federal High Court in Lagos has adjourned a suit by activist-lawyer Mr Toluwani Adebiyi to February 11 and 15 next year.
The court had restrained NERC from increasing tariff following an ex-parte application by Adebiyi.
The lawyer sought an injunction to stop the commission from raising tariff without steady power for 18 hours a day.
When the case came up before Justice Mohammed Idris, NERC and the Distribution Companies (DISCOs) informed the court about their pending applications objecting to the suit.
Adebiyi, who said the applications were devices to delay the hearing, sought time to respond.
The order, the lawyer said, is still subsisting, warning that NERC cannot increase tariff this year until the suit is determined.
Adebiyi said Form 48 is already prepared for whoever dares the court by increasing tariff when the order has not been discharged.
The lawyer had initiated contempt proceedings against NERC chairman Dr Sam Amadi over his claim that judges were frustrating reform in the electricity sector, but the judge later urged the plaintiff to withdraw it.