The SA Federation of Trade Unions - SAFTU - says it has joined the legal challenge to hold the government and Eskom management accountable for the energy crisis the country finds itself in.
Its affiliate Numsa is already part of the process.
Saftu spokesperson Trevor Shaku says mismanagement at the embattled power utility has resulted in loadshedding that has now moved from being intermittent, to regular amid continuous blackouts.
Eskom board chairperson Mpho Makwana said during a media briefing on Sunday that Eskom was considering keeping load shedding at a minimum of stage 2 and stage 3 permanently over the next two years.
"We want to give sufficient space for maintenance while giving the country a level of predictability or consistency to plan livelihoods better," reasoned Makwana.
And, while outgoing CEO Andre De Ruyter was obligated to only serve a 30-day notice he had agreed to stay on in his position until the end of March, but Shaku feels he should vacate his position immediately.
"In our call for his resignation we were not oblivious to the fact that the Eskom crisis was engineered by the policies of the ANC government and the endemic corruption which continues to plague this government."
Shaku added that other reasons pertaining to SAFTU supporting the possible litigation that may follow was informed by the devastating impact of loadshedding on the country.
President Cyril Ramaphosa has meanwhile asked Eskom not to implement the 18.65% tariff hike that is due to take effect in April.
Speaking in Bloemfontein at the weekend, he said he realises that Eskom is in dire need of more cash but that any hike needs to be suspended during the load-shedding crisis as it will just add further injury to South African citizens.
