How to Keep Extension Cords Safe in Your Home

An extension cord is a power cable that is used to reach an electrical outlet when the original cord is too short. These cords come in different lengths and types of plugs and can range from 2 feet to 100 feet. It's important to choose the right cable length for your needs, and using more than one electrical cord is not recommended, as it creates a drop in power. Moreover, using a cord that is too long can create a tripping risk.

Types of Extension Cords 

Different applications may need different power levels, so it's good to know how electrical cords vary and how to use them safely. Here are some general tips on the different kinds of extension cords: 

Extension Cords Types by Duty:

Light Duty

Light-duty extension cords are a basic type of extension cord that can be used for light-duty equipment, such as lamps, alarm clocks, and phone chargers. These cords are typically the most affordable option, but they also have some safety concerns as they often don't have a grounding wire.

The cords are identified by a letter code, with the letter "S" indicating that the cord is intended for general use. The appropriate gauge of the cord depends on how long it needs to be. For shorter cords (up to 25 feet), an 18 AWG wire is suitable. If the cord is expected to be up to 50 feet long, a 16 AWG wire is recommended. Finally, for cords that are 100 feet long, a 14 AWG wire is suggested.

Always keep in mind that light-duty extension cords should only be used for low-power devices with an ampacity of 7 Amps or less. Using a cord that is not rated for the appropriate amperage can cause safety issues and damage to the equipment.

Medium Duty

Regular-duty extension cords are similar to light-duty cords, but they have an added grounding wire that makes them safer for use with a wider range of devices. These cords are designed for devices that require up to 10 Amps of power, such as TVs, speakers, computers, and media players. However, they should not be used with heavy-duty appliances. Medium-duty extension cords are available in different gauges, with the 16 AWG version suitable for cords up to 25 feet long, the 14 AWG version for cords up to 50 feet long, and the 12 AWG version for cords up to 100 feet long. 

Heavy Duty

Heavy-duty extension cords are designed for use with high-power appliances, such as space heaters or an air conditioner. These cords can handle up to 15 Amps of power and are available in sizes between 14 AWG and 10 AWG. For cords up to 25 feet long, a 14 AWG cord is recommended. For cords up to 50 feet long, a 12 AWG cord is recommended. And for cords up to 100 feet long, a 10 AWG cord is recommended.

Types of Extension Cords By Application

Indoor Electrical Cords 

An indoor extension cord is designed for use in dry environments and is not suitable for outdoor use. They are generally thinner, shorter, and less powerful than outdoor options, and also lack the protective materials to shield against moisture, temperature changes, and sun damage. They have lower amperage ratings as well as they are intended for lower-power applications.

Outdoor Electrical Cords

Outdoor extension cords are designed with a durable layer of weather-protective insulation, and they also come in much longer lengths and can handle more current. They are made with thicker gauge wire and are coated with a durable material, such as rubber, plastic, or vinyl. Some heavy-duty outdoor cords are specially designed for use around flammable liquids, chemicals, or in extreme temperatures. You can identify these cords by looking for a "W" on the packaging or the cord itself, which means it's safe for outdoor use.

Inspecting Extension Cords

When inspecting electrical cords, you should look for any signs of damage that could increase the risk of electrical shock or fire. Also inspect if before use, especially if they've been stored for a long time or exposed to harsh weather. Here are some things you can look for when inspecting electrical cords:

• Cracks or damaged insulation

Look for cuts or tears in the outer insulation jacket or inner insulation, dry rot, or cracked or worn outer insulation jackets. If the outer jacket is compromised, the cord can't be repaired with tape and shouldn't be used.

• Exposed wires

Look for exposed inner insulation or cuts in the jacket that expose the colors of the inner conductors.

• Loose plug blades

Make sure the plug is securely attached to the cable, and that no part of the prongs are exposed when the plug is inserted.

• Signs of overheating or burning

Look for smoke, melted insulation, or a spring-like or coiled appearance. If a cord feels more than comfortably warm, you should have an electrician check it.

Safety Tips for Extension Cords

At Randy’s Electric, we take the safety of our customers in the Minneapolis–Saint Paul area seriously and are always here to help, here are some safety tips for using electrical cords. 

1. Choose the Right Cord: Use the appropriate type and gauge of extension cord for your device’s power needs and the length required.
2. Inspect Before Use: Check cords for any signs of damage, such as fraying or exposed wires, before plugging them in.
3. Avoid Overloading: Outdoor extension cords are designed to withstand the elements and should be used for any outdoor applications. Using an indoor cord outside can cause overheating and fire hazards.
4. Do Not Daisy Chain: Do not connect multiple extension cords together, as this can result drop in amperage.
5. Use Grounded Cords: Choose grounded extension cords when using high-power devices.
6. Avoid Running Under Rugs: Don’t hide cords under rugs or heavy furniture, as this can cause overheating.
7. Store Properly: When not in use, store extension cords neatly to prevent tangling and damage.
8. Keep Away from Water: Make sure cords are not placed near water sources to prevent shocks.
9. Unplug Cords: Always unplug extension cords when they are not in use to avoid potential risks.

Contact Reliable Minneapolis Electricians Today! 

At Randy's Electric, we offer residential electrical services throughout the greater Twin Cities metro area. Our certified and highly trained electricians can handle any electrical job including but not limited to installing new power outlets, upgrading your main electrical box, rewiring your home, and emergency electrical services. We're the team you can trust to get the job done right the first time. 

Whether you have any questions about using extension cords safely or if you need any other kind of electrical work done, give us a call today. We're here to help with all your residential electrical needs.