Extension cords have been around for a long time, and for good reason. They're an easy way to access electricity without an outlet, but several extension cords are available. Walker Electric is here to help you pick the right extension cord.

Two-Prong vs. Three-Prong Extension Cords

Does the number of prongs on your extension cord make a difference? Absolutely. The third hole grounds the plug. A grounded plug means the risk of shocks or electrical fires is less if a malfunction occurs at any point in the circuit. Some indoor extension cords have two prongs, but all cords made for outdoor use will have three.

The Difference Between Indoor and Outdoor Extension Cords

Extension cords for indoor use tend to be thinner and shorter. They also carry less power. Cords rated for outdoor use are thicker because they have a protective insulation layer. They carry more current since you use outdoor extension cords for power tools and other DIY projects. You can use an outdoor extension cord inside your home but only an indoor one inside because it can be dangerous without the grounded prong and extra insulation.

Deciphering Extension Cord Letter Codes

All extension cords have letters and numbers on the jacket. These let you know what type of cord you're buying and what conditions it can handle. If you ever find a cord without an alphanumeric code, it doesn't have the correct safety rating, and you should stay far away. These are what you'll see on extension cords at your hardware store:

• S - A flexible cord for general use
• W - The cord is rated for outdoor use
• J - Has a standard 300-volt insulation
• O - These cords are oil-resistant
• T - The jacket's cord is made using vinyl thermoplastic

How Long Should An Extension Cord Be?

You want the shortest cord that will serve its purpose because every foot of the cord lessens its capacity to transport power. However, you don't want to find yourself on a job site and have a short extension. Determine the required length and add extra to ensure you have some wiggle room.

What Amperage Do I Need For My Project?

Your extension cord must handle the amount of amperage you need for what you're powering. A cord without enough amperage can overheat and damage the device plugged into it. It will have to work harder attempting to draw sufficient electricity. Follow these guidelines for matching the amp number to your project:

● 1-13 amps with light-duty 16 gauge wire

• Work lights
• Portable fans
• Hedge trimmers

● 14-15 amps with medium-duty 14 gauge wire

• Lawn mowers
• Power drills
• Chainsaws

● 16-20 amps with heavy-duty 12 gauge wire

• Chainsaws
• Circular saws
• Air compressors
  

Safety Tips for Extension Cords

• Never use a cord with visible damage. Even if the damage is minor, it increases the risk of the cord malfunctioning.
• Don't create a chain of extension cords. Connecting several extension cords is a fast way to possible fires.
• Using several extension cords around your home may require a wiring upgrade to provide more direct-wall outlets.
  

Electrical Services Near Lexington, Kentucky

If you need assistance picking an extension cord, contact the professional electricians at Walker Electric. We have served the community since 1976 and offer multiple services, including electrical design-build, industrial service work, and electrical installations.

Walker Electric is in Lexington, Kentucky, and serves Fayette County, Lexington, Frankfort, Richmond, Georgetown, and surrounding counties. Contact us today to schedule service for your commercial or industrial project.