Eskom workers affiliated with the National Union of Mineworkers (NUM) have continued to down tools despite an urgent court interdict filed against them.
Union members and Eskom officials reached a deadlock over wage talks and labour group CCMA has been asked to mediate.
The power utility obtained a court order on Tuesday to try and stop around 15,000 workers from going on strike.
NUM's chief negotiator Helen Diatile denies that union members are blatantly defying the law, and says the NUM legal team is looking into the court order.
Diatile says the union is overwhelmed, as the interdict comes amid ongoing arbitration.
She says that Eskom has shown that it feels workers are dispensable and has stolen employees' right to strike.
Eskom workers are demanding an increase of between 12-13%, while the power utility is only willing to offer 7-9%.
Listen to the full conversation from The Midday Report with Stephen Grootes: