The National Union of Metalworkers of South Africa has come up with proposals to unbundle Eskom, reiterating it will resist all attempts to either break up the struggling power utility or privatize it.
Numsa is one of three recognized trade unions at Eskom, together with the National Union of Mine Workers and Solidarity.
In a statement on Thursday Numsa General Secretary Irvin Jim said the union had not been consulted for its views on unbundling Eskom.
At the event Gordhan said the government would be debating the unbundling of Eskom "soon".
This idea of unbundling Eskom has been proposed by energy experts such as Chris Yelland and the Organization Undoing Tax Abuse as part of a broader strategy to fix the debt-laden power utility. The idea generally involves breaking Eskom up into separate electricity generation and power transmission entities.
In July 2018 ANC chief treasurer Paul Mashatile told the Cape Town press club Eskom could be broken up in the three entities: production, transmission and distribution.
Jim on Thursday criticized Gordhan for not engaging labor on the future of Eskom.
"We are the most important stakeholder at Eskom because we represent employees and nothing has been communicated to us on the future of the SOE," he said.
"Our members read these reports and they are understandably alarmed because there is no consultation with Eskom's work. They have every reason to be worried because Eskom recently embarked on the retrenchments of senior executives in December, without informing or consulting union."