Unions and Eskom were hunched around the negotiating table late into the night, failing to reach an agreement.
Unions are reportedly prepared to drop their demand to 8 percent, on condition other demands are met.
Numsa's Irvin Jim has been part of those robust negotiations.
"We have taken a decision as a collective of unions that we must convene a meeting with both the board, Finance Minister Nhlanhla Nene and Public Enterprises Minister Pravin Gordhan," said Jim.
"We have now decided that we'll escalate the negotiations at that level."