According to the Electrical Safety Foundation International (ESFI), thousands of people in the U.S. are critically injured or electrocuted as a result of electrical fires and accidents in their own homes. Many of these accidents are preventable.

Electricity is a necessity, and it powers our daily lives. Electricity can also be dangerous and deadly; safety must lead every decision around electricity. Be mindful of the following hazards at work and at home:

Frayed wires pose a serious safety hazard. Power cords can become damaged or frayed from age, heavy use or excessive current flow through the wiring. If cords become frayed or cut, replace them, as they could cause a shock when handled.

Avoid overloading circuits. Circuits can only cope with a limited amount of electricity. Overload happens when you draw more electricity than a circuit can safely handle––by having too many devices running on one circuit.

Label circuit breakers to understand the circuits in your home. Contact a qualified electrician if your home is more than 40 years old and you need to install multiple large appliances that consume large amounts of electricity.

Use extension cords properly. Never plug an extension cord into another extension cord. If you “daisy chain” them together, it could lead to overheating, creating a potential fire hazard. Don’t exceed the wattage of the cord. Doing so also creates a risk of overloading the cord and creating a fire hazard. Extension cords should not be used as permanent solutions. If you need additional outlets, contact a licensed electrician to help.