He said load-shedding was also a perfect opportunity for cable thieves to strike.
“They know the schedules, and where there is no electricity they go in and take the cables out and sell them to scrapyards.”
Again, this was normally noticed only at a later stage when Eskom restored power to the area, he said.
Mangena said in the past the city’s equipment was not properly maintained and serviced, adding that there had been no new substations built.
“The ageing infrastructure fails to handle the pressure of the on and off. At times cables explode - we saw this with the previous load-shedding where our equipment was damaged.
“It also puts restraints on our resources. We receive a lot of calls from the public.”
Eskom on Wednesday warned that load-shedding was expected to continue all day on Thursday.
Eskom's acting group executive, Jabu Mabuza, said the implementation of stage 2 load-shedding was to protect the power system from a total collapse or blackout.
The rotational power cuts were needed because the electricity system had become “severely constrained”, the statement said. “We understand the inconvenience that comes with load-shedding and want to assure our customers and South Africans at large that our objective is not to implement load-shedding; if necessary, to do so at minimal levels, with as much predictability as possible,” Mabuza said.