"Of the seven employees tested for Covid-19 following contact with the infected person, thus far six results have been received and they are all Covid-19 negative."
Eskom said it had put strict infection, prevention and containment measures in place to deal with Covid-19.
"Our work spaces are regularly cleaned and disinfected in order to prevent the virus coming into the workplace.
"Other pandemic prevention measures were put in place about a month before the country went on national lockdown. These include testing employees for abnormal body temperature before they enter the workplace, providing hand sanitisers throughout the facilities and providing protective equipment such masks to all employees."