Yes, an extension cord can absolutely go bad and become a fire hazard, typically due to physical damage like frayed wires, cracked insulation, bent prongs, or from being overloaded, overheated, or used improperly (e.g., permanently). You should regularly inspect cords for wear and tear and discard any that show signs of damage, as they are meant for temporary use and can degrade over time.
Signs your extension cord is no longer good
If you overuse or misuse the wire, it will likely get damaged sooner. Similarly, if you live in hot or humid weather, the moisture can gradually destroy the insulation on the cord and once it's frayed, you will need to replace the cord. Generally, industry experts recommend replacing power cords every 3 to 5 years.
Disconnect the device from the power source and replace power cord to prevent potential fire hazards and ensure safety. Industry experts recommend regularly examining power cords and replacing them every 3 to 5 years, considering factors like usage frequency, environmental conditions, and manufacturing standards.
An extension cord can also get worn out by frequent use, exposure to sunlight, or contact with chemicals.
Signs your house needs rewiring
As Permanent Wiring
“Over time, extension cords can wear down, overheat, and become a fire hazard,” says Joel Worthington, president of Mr. Electric. If you must continue using an extension cord in any given situation, regularly replace it as a precaution.
Here, we highlight the top ten appliances that should never be plugged into an extension cord and the dangers to expect if you do.
When your devices are plugged in but not in use, they consume electricity, known as the phantom effect. As a result, unplugging those devices can save electricity.
Extension cords cause over 3,000 home fires each year, resulting in an average of 50 fatalities and nearly 300 injuries. Oftentimes, extension cords are used improperly and can overheat or short out.
Do not overload cords with more than the proper electrical load. Do not run extension cords through doorways, holes in ceilings, walls, or floors. Do not move, bend, or modify any of the extension cord plug's metal parts. Do not daisy chain, or connect, multiple power strips together.
Many people mistakenly believe that with enough outlets on the cord, it can simultaneously handle multiple high-wattage appliances. However, each extension cord has a maximum capacity, typically measured in amps or watts. Exceeding this capacity can cause the cord to overheat, leading to a potential fire.
Power cords most often fail at the connections to the plug due to mechanical stress from frequent handling. Other possible failure points include connections to the load, crimped sections, and molded receptacles. Proper handling and care can help reduce these failures.
Surge protector power strips typically have such switches and help protect your appliances and electronics If you plug all of your products into a power strip and flip off the power strip when these items are not in use, they are truly off. Unplug Your Products.
Signs of An Overloaded Outlet
Safety Features:
For example, the Kendall Howard Lan Station 48″ Power Strip offers 16 outlets, a 1060 joule surge protector, and a 15A circuit breaker for enhanced safety. Extension cords generally lack surge protection, so they're less suited for sensitive electronics.
Electric cords that no longer function as expected are candidates for disposal. If the cord fails to deliver a steady connection, it may have internal damage or wear. For USB or charger cables, unreliable performance often means the internal wiring is compromised.
According to the U.S. Fire Administration, simple precautions you can take will significantly reduce your risk of a cord-related house fire. Here are some: Replace all extension cords after two or three years. Most cords are not intended for long-term use, so inspect them annually.
Look out for any signs of damage:
Warning signs include persistent burning smells, discolored or warm outlets, flickering lights, buzzing or crackling sounds, and frequent circuit breaker trips. If you notice these symptoms, especially in combination, turn off the power to the area and contact a licensed electrician immediately for inspection.
Electricians check for faulty wiring with diagnostic tools such as multimeters to measure voltage, current, and resistance in circuits. They also visually inspect wires for signs of damage, such as fraying or discoloration. Electricians also perform continuity tests to ensure proper connections throughout the wiring.