Load shedding is a measure taken to avoid a total power failure in the whole country. It usually occurs when the power supply of a country cannot meet the needs of all customers in terms of electricity. Eskom then takes steps to keep the system steady and avoid cleaning the reserve. Load shedding is done by sharing the little available power supply amongst the customers. When power is insufficient Eskom can either increase their supply or reduce demand to bring the system back into the balance. Load shedding occurs when Eskom fails to up the supply. Load shedding schedules are drawn up beforehand to explain the plan and necessity of load shedding. If the supply is too low, then Eskom can resort to unscheduled electricity cuts or failures will occur. Although unscheduled power cuts are minimum but if they are declared customers can be affected anytime.