Wire Identification: What All The Letters on Your Cord Means

Once you know the code, choosing the right cord becomes simple.

All the information you need to know about this cord is printed along the wire.

If you've ever looked closely at an extension cord or power supply cord, you've probably noticed a series of letters and numbers printed right on the wire itself - something like SJOW or SVT. You may have also seen these markings on the cardboard packaging your cord came in and wondered what any of it means.

These markings are actually a standardized system designed to tell you exactly what type of cord you're working with. Once you understand them, you'll be able to pick the right cord for any job with confidence.

WHAT THE MARKINGS TELL YOU

Every portable cord, the type used to make extension cords and power supply cords, is marked with information that identifies:

• The wire gauge (thickness)

• The number of conductors (wires inside)

• The temperature rating

• The voltage rating

• The type of materials used

These markings are universal within each country, so any cord you pick up should have them.

PUTTING IT ALL TOGETHER

Now that you know what each letter means, you can decode any cord at a glance. Take this common example:

That's all the information you need to know whether a cord is right for your job right there on the wire itself.

WHY THIS MATTERS

Using the wrong cord for a job isn't just inconvenient, it can be dangerous. A cord rated for 300 volts used in a 600-volt application, or an indoor cord run outside in wet conditions, creates a real safety risk. Taking thirty seconds to read the markings on a cord before you buy or use it is one of the easiest ways to protect yourself, your equipment, and your home.

Have questions about which cord is right for your specific need? We're happy to help! info@cdpropowercords.com or 952-944-1044