Molly Ayala
Power outages are a sudden loss of electricity supply that can affect a single home, a few blocks, whole neighbourhoods, or even an entire city. Power outages can be caused by a variety of factors, including natural causes, human error, equipment failure, animal interference, inclement weather conditions, and overload. While some outages are brief, lasting only seconds or minutes, others can persist for several weeks. Understanding the causes of power outages can help individuals and communities prepare for and mitigate the impact of these disruptions.
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What You'll Learn
Natural causes, human error, and overload
Power outages occur when electricity, particularly the electrical power network or electrical grid, is unavailable. While the electrical grid is designed to be robust and withstand physical elements and human errors, sometimes the system fails.
Natural Causes
Natural causes, such as inclement weather conditions, are one of the most common reasons for power outages. Lightning and violent wind storms can cause power lines to become damaged, leading to extended outages. These types of outages can impact entire communities and affect the economy, as they typically affect large areas or regions, not just a single home.
Human Error
Human error is another common cause of power outages. This can include accidents, such as a drunk driver crashing into a power pole, or equipment failure due to maintenance issues. In some cases, human error can also lead to scheduled maintenance, which usually results in temporary power outages that are communicated to households in advance by the utility company.
Overload
An overload in the electrical system can also cause power outages. This can occur when multiple appliances are turned on simultaneously, tripping the breakers. Additionally, power surges or spikes when the power returns can damage sensitive equipment and large appliances, leading to potential outages. Overloads can also be caused by animal interference, such as a tree falling on a power line.
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Power surges and spikes
External power surges can be caused by lightning strikes, utility company actions, and infrastructure issues. For example, a tree limb touching a power line, a small animal getting into a transformer, or transmission lines or transformer malfunctions.
Internal power surges are also common and can happen when high-power electrical devices, such as refrigerators, air conditioners, or heaters, are switched on or when a high-energy component like a motor kicks in. This can affect other electrical items in the home. Faulty or outdated wiring can also lead to internal voltage fluctuations and power surges.
Power spikes are instantaneous, very high-intensity bursts of electrical power. Lightning strikes are a common cause of power spikes, transmitting electromagnetic energy into the home through power lines, telephone lines, and other access points. Voltage spikes can also occur when electricity is restored after a blackout on the local utility grid.
To protect against power surges and spikes, it is recommended to use power strip surge protectors or install whole-home surge protection systems. Surge protectors act as barriers, absorbing excess voltage and protecting valuable electronics. For higher-value devices, higher joule ratings are recommended to protect against high voltage spikes.
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Protecting perishable food
Before a Power Outage
Prepare for potential power outages by equipping your refrigerator and freezer with appliance thermometers. These thermometers will help you monitor the temperature of your appliances during an outage, allowing you to make informed decisions about food safety. Additionally, keep a food thermometer on hand to check the temperature of specific foods if you're unsure about their safety.
During a Power Outage
Keep the refrigerator and freezer doors closed as much as possible to maintain the internal temperature. Perishable food in the refrigerator will remain safe for up to four hours during a power outage. If the power is expected to be out for longer, transfer perishable items from the refrigerator to a cooler with ice or frozen gel packs. Ensure the cooler is kept in a dry and cool location.
After a Power Outage
Once the power is restored, check the temperature of your refrigerator or freezer using the appliance thermometers. If the temperature is still at 40°F (4°C) or below, the food is generally safe and can be refrozen. However, thoroughly cook meat, poultry, fish, and eggs before consumption to ensure the destruction of any potential foodborne bacteria.
Additional Tips
- Freeze containers of water ahead of time to help keep your refrigerator or freezer cold during an outage.
- Group food together in the refrigerator and freezer, as this helps retain the cold temperature for a longer duration.
- If the power outage is prolonged, consider obtaining dry ice or block ice to maintain the temperature in your refrigerator and freezer.
- Always handle dry ice with gloves, as direct contact can cause severe burns.
- If there is any chance of your food coming into contact with floodwater, store it on shelves that are safely out of reach of contaminated water.
Remember, when in doubt, throw it out! It is better to be cautious when it comes to food safety.
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Using power generators
Power outages can occur due to various reasons, ranging from weather conditions, natural disasters, and accidents to planned outages by utility companies for maintenance, repairs, or upgrades. While some outages are temporary and brief, others can last for hours, days, or even weeks. During these power outages, using a power generator can be a viable solution to restore electricity supply, especially for essential appliances and devices.
When using a power generator during a power outage, it is crucial to prioritize safety and follow the instructions provided with the generator. One of the essential safety precautions is to ensure the generator is placed outdoors, at least 20 feet away from the house. Running a generator inside a house, garage, or shed can lead to lethal levels of carbon monoxide buildup within minutes, posing a severe risk of hospitalization or fatality.
To connect appliances to the generator, it is recommended to use heavy-duty, outdoor-rated extension cords rated at least equal to the sum of the connected appliance loads. Appliances can be plugged directly into the generator or into the extension cord. It is important to note that plugging the generator into a wall outlet, known as "back feeding," is extremely dangerous and can lead to the electrocution of utility workers or neighbors sharing the same utility transformer. The safe alternative is to have a qualified electrician install a power transfer switch to connect the generator to the house wiring.
When using a generator, it is crucial to ensure it produces more power than the connected appliances draw. If the generator cannot meet the power demand, staggering equipment use is advised to prevent blowing a fuse or damaging the equipment. Additionally, allowing the generator to run for a minute or so before plugging in appliances and unplugging loads before shutting it off are recommended practices.
Portable generators are a common option for emergency power during outages. They can supply power to a few critical appliances, lights, or charge electronic devices like cell phones. However, they require manual operation, regular refueling, and provide limited power. Standby generators, on the other hand, are permanently connected to the home's electrical system and offer fewer limitations, operating automatically and using the home's natural gas or propane supply.
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Reporting the outage
Power outages can be frustrating and distressing, and there are many reasons why they may occur. It is important to report outages to the relevant authorities so that they can be resolved as soon as possible. Here are some steps you can take to report a power outage effectively:
Contact Your Power Company:
- First, identify your power company or utility provider. You can usually find this information on your monthly electricity bill or by searching for your area's power provider online.
- Call their customer service or emergency hotline, which should be listed on their website or your bill.
- Provide them with your location, including your address and any nearby landmarks or intersection points.
- Describe the situation, including when the outage started and any potential causes you may have noticed, such as fallen power lines or damaged electrical equipment.
Report to Local Authorities:
- If the power outage is due to a fallen tree or damaged utility pole, it is essential to contact your local authorities, such as the police or emergency services.
- They can help secure the area, ensure public safety, and coordinate with the power company to restore electricity.
Stay Informed and Prepared:
- Keep yourself informed about weather conditions and potential natural disasters that could impact your area.
- Prepare an emergency kit with flashlights, batteries, non-perishable food, and other essential supplies to help you through extended power outages.
- Consider investing in a whole-house surge protector to safeguard your electronics during power fluctuations.
By following these steps and staying calm, you can effectively report power outages and play a part in restoring electricity to your home or community. Remember to be patient as power companies work to address the issue, especially in widespread or severe outage situations.
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Frequently asked questions
There are many reasons why electricity goes out, ranging from natural causes, human error, and equipment overload.
Inclement weather conditions such as lightning or violent wind storms can damage power lines and lead to electricity outages.
Human error can cause electricity to go out in a variety of ways, from scheduled maintenance to animal interference.
Equipment overload occurs when too many appliances are plugged in, causing an interruption in the power supply.
Here are some important steps to follow if the electricity goes out:
- Report the power outage to your utility company.
- Protect your appliances and electronics by unplugging them to prevent damage from power surges.
- Use a power generator, but be cautious to avoid carbon monoxide poisoning.
- Keep freezers and refrigerators closed to prevent food spoilage.
