Electricity cannot be stored efficiently and so power generators must constantly supply the amount of electricity being used at any one time.

Electricity networks must safely deliver this electricity, so they too must be designed and built to match the amount of electricity needed by homes and businesses at peak times when demand for power can reach high levels.

On very few occasions, power stations or parts of the electricity network are not available or able to operate at maximum capacity when demand for power is high.

By sharing or rotating electricity supply to customers during these times, electricity distributors can avoid more widespread power outages, or potentially long lasting interruptions.

When load shedding is required, we make every attempt to ensure important customers such as hospitals and retirement homes have back up supply, such as portable generators. We also make every attempt to contact individual customers who may require continuous supply.

Top tips

• Turn off all power points, light switches, appliances and electronic equipment. This will reduce demand on the grid and provide greater safety when power is restored in your area
• Avoid using non-essential electrical appliances when you have power during the rotating event. Keep the big energy users like washing machines, swimming pool pumps, dishwashers, heaters or air conditioners turned off if possible.
• Turn the fridge off and leave the fridge door closed as much as possible to keep food fresh. Consider putting the most commonly used items like milk and drinks in an esky or tub filled with ice. 
• If it's happening at night, leave a light turned on so you'll know when power in your area has been restored. 
• Have fresh batteries available for torches and radios. 
• Take care if you're using candles. 
• Keep an eye out for neighbours. This is especially important for the elderly, sick or those with young children. 
• If you have a gas barbeque, keep the gas bottle full. You can still cook and make hot drinks. 
• Remember if you have gas hot water or a gas stove you can still shower and cook.
• If you are feeling unwell, contact friends, family or a doctor for help, or relocate to an area with power. Many major clubs and shopping centres have generators so can provide respite from the hot or cold weather during outages. 
• Take care when driving as traffic lights may be affected by power interruptions.