Eskom announced Stage 2 load-shedding will continue on Wednesday from 8am to 10pm.
The power utility said the breakdown of multiple units resulted in the power system being constrained.
“With the unreliable and aged generation infrastructure, together with a number of risks on running units, there is a high possibility that additional stages of load-shedding may be implemented at short notice,” read a statement from Eskom.
A generator each broke down at Arnot, Medupi, Lethabo, Matla powerstations, while two units each at Majuba, Camden and Tutuka powerstations also broke down.
This, together with the need to conserve emergency generation reserves, necessitated that loadshedding be implemented in order to protect the integrity of the system.
Eskom is urging customers to reduce electricity usage to ease the strain on the system. The current loadshedding stage could be moved up at short notice.