Pravin Gordhan says he intervened in Eskom's wage dispute as load shedding would be detrimental to the economy.
Unions say they will continue to fight for wage increases, despite Eskom's court interdict to stop protests.
According to analysts, the parastatal is both financially and environmentally unsustainable.
'Just how possible is such a shutdown? The truth is, not as easily done as it is said.'
The power utility implemented load shedding on Thursday night as a direct result of "sabotage", it said.
Salary increase for puplic servants are already over Treasury's budget, and Eskom says it cannot afford to give its workers an increase at all.
Eskom staff have declared a dispute with the power utility as they prepare to strike over Eskom's offer of a 0% wage increase.
Eskom has offered no pay increase to employees, angering unions.
Mother of slain Eskom employee Thembisile, Nester Yende says the justice system has failed her. One year after her daughter's killing authorities have yet to find those responsible.
"I dreamt about her the other day, she was alive. I was so happy..." HuffPost visits Yende's family.