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Load Limiting is a technology that enables City Power to gauge household consumption in relation to available generating capacity and disconnects households that use electricity excessively during periods of constrained supply to relieve pressure on the grid.
When the grid is under pressure during peak periods, City Power alerts households via smart meters to reduce consumption by switching off non-essential items such as pool pumps and geysers. The deployment of Load Limiting will enable City Power to forestall the implementation of the early stages of load shedding in its areas of supply by curtailing consumption.
The demand for electricity far outstrips the available generating capacity. During peak hours between the hours of 17h00 and 22h00, the grid gets under severe pressure as households connect energy-intensive appliances. When the generating capacity fails to meet demand, Eskom has to shed or reduce the load to ensure that the grid doesn't collapse. Certain areas will be disconnected to in order to avail power to other areas at the same generating capacity. Load Limiting then enforces compliance by reducing household consumption during periods of constrained supply without having to switch of the entire neighbourhood.
Different stages of load shedding require Eskom to reduce varying amounts of consumption. Stage 1 load shedding requires a load reduction of 1000 MW, Stage 2 up to 2 000 MW and Stage 3 up to 4 000 MW. When Eskom announces the onset of Stage 1 and Stage 2 of load shedding, administering Load Limiting by reducing household consumption would free up this energy shortfall, particularly the early phases of load shedding.
When Eskom issues a directive to municipalities to reduce the load, City Power activates Load Limiting by sending a signal to households who are over the consumption threshold between 17h00 and 20h00 to reduce consumption.
The power supply would go off in 30 second intervals to alert the household to disconnect electricity appliances to within the required level. The household that hasn't reached the required consumption levels will continue to get these recurrent power outages until they have reduced their consumption to the mandatory level.
By switching off non-essential appliances and being Load Limited, customers have saved themselves the inconvenience of being left completely in the dark by being completed load shed.
Load Limiting technology requires a smart meter. City Power is still continuing with the project of rolling out smart meters across Johannesburg.
Residents who are Load Limited should disconnect all energy intensive appliances such as stoves, heaters, geysers, pool pumps, and underfloor heating during the Load Limiting period. The target appliances should be appliances those that draw a lot of energy. Many appliances indicate the amount of energy they consume, and this could serve as a guide.
In addition, residents should also note that Load Limiting is not only confined to the main house, but applies to secondary dwellings as well such as cottages, staff quarters and outside rooms as they all draw electricity from a single source.
on our assessment of usage patterns, we have found that an average households
consumes about 42Amps of electricity. Load Limiting seeks to reduce consumption
by half to below 21Amps of usage.
Load Limiting lasts for the duration of load shedding which is between the hours of 17h00 and 22h00.
may switch back some disconnected appliances after the Load Limiting period but
this should be done when it is really necessary.
in voltage supply happens when a fault has been detected and power is
reconnected. In the case of Load Limiting, power is remotely switched off like
you would in a normal manner, so there is no sudden increase in voltage. We
don’t foresee appliances being damaged due to the implementation of Load
The way the system is configured, we don't anticipate the system resulting in any damages to appliances. In the event that a resident wants to lodge a claim for damages, City Power has processes that need to be followed and the claim needs to prove negligence on the part of City Power. Nonetheless we are confident that this system will not impair any appliances.
If City Power is not able to access your property to read the meter/s, your electricity supply can be disconnected according to the Electricity Regulation Act no 4 of 2006, The Local Government Municipal Systems Act, and the Electricity by-laws, which states that consumers may be disconnected if two consecutive meter readings are missed.
If you suspect that your meter is faulty, please contact the call centre at 011 490 7484 to make an appointment with City Power technician.
You can find the details here
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