The regulator expressed displeasure that the trend of non-payment by the steel company had continued for a long time.
It added that the Federal Government had been urged to intervene to avoid total disconnection from the grid.
“This continues a longstanding trend of non-payment by this customer and the commission has communicated the need for intervention on this issue to the relevant FGN authorities.
“A continuation of the non-payment may trigger total disconnection from the grid,” NERC threatened.
In January, the TCN disconnected ASCL from the national grid as the moribund company failed to clear a debt of N33bn owed to the NBET and service providers.