A group of protesters from Mpumalanga forced Eskom to close the main entrance of its headquarters in Sunninghill, Johannesburg, on Wednesday.
Eskom spokesman Khulu Phasiwe said protesters were gathered at the main gate and, for security reasons, management made the decision to close it and asked officials to use the west entrance.
"This has led to a long traffic in the direction of the single entrance, with about 3,000 employees arriving to work in the morning, so there was a lot of backlog that led to the west entrance," said Phasiwe.
Phasiwe said demonstrators had previously arrived at Eskom's headquarters during lunchtime demanding that they be employed at Eskom's power plants in Mpumalanga.
They also demanded that they be considered for coal supply contracts.
Phasiwe said the group of about 50 people were from communities around the Kendal Power Plant near Ogies in Mpumalanga.
He said that the officers of the police department of the subway of Johannesburg were driving the traffic.