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Allied Encyclopedia: Type SJT Cord vs SVT Cable

Tuesday, July 14, 2015

In the world of wire and cable, details matter. Although on the surface, SVT cord and SJT cable only differ in terms of their middle letters, once we delve in and take a closer look at these two portable cords, we will start to uncover important differences.

SJT Cable and SVT  Cord Basics

Let’s begin with the basics, such as cable definitions for SVT cable and SJT cord. Both SVT cable and SJT cord are portable cords, meaning they are cables meant for temporary power. Portable cords such as SVT and SJT cables are both durable and resilient. Since they’re used in many applications, ranging anywhere from lamps to construction equipment, they don’t have any other choice but to be reliable, strong, and long-lasting.

Now that we have some background knowledge about the purpose of a portable cord, let’s look at “SVT” and “SJT” more closely. When talking about portable cords, it's all in the name. Each letter represents a rating applicable to the cord. The most relevant letters and their meaning for this article are as follows:

  • “S” stands for service, meaning the cord has been rated for 600 volts or less.
  • “V” stands for vacuum cord, which references one of the cable type’s common applications. Rated to 300 volts.
  • “T” stands for thermoplastic, which refers to the material the cord jacket is made of.
  • “J” stands for junior, short for Junior Service, meaning the cord has been rated at 300 volts.

Likewise, if you see a cord marked SJTOOW, know that this is the same type of cable as SJT service cord. However, for SJTOOW cable, the cord's outer jacket and the insulation are both oil resistant, as indicated by the "OO" in the name. The “W” at the end means that the cord is approved as weather and water-resistant, and can be used both indoors and outdoors.

For more on portable cord letters and definitions, visit this Allied Encyclopedia article.

What do SVT cable and SJT cord have in common?

As we can see from comparing the two names and referring to the letter meaning above, both SVT cable and SJT cord have cord jackets that are made of a thermoplastic like polyvinylchloride. SVT cord and SJT cable are also insulated with PVC. Additionally, both are rated up to 300 volts and are resistant to oils, acids, ozone, and alkalis.

SVT cord SVT cord
SJT cable SJT Cable

What's the difference between SVT cord and SJT cable?

The fundamental difference between SJT cord and SVT cord is the thickness of cable. With thicker insulation, SJT cable has a larger overall diameter than SVT cable. SJT cord is also available in a wider spectrum of gauges, increasing the variety of power needs this cable can meet. Common applications include portable lights, heavy tools and equipment, power extensions, and use in other hard service functions. SVT cable, on the other hand, is more often used in light-duty applications, including providing power for vacuum cleaners, food processors, and office equipment.

Overall, it’s important to be able to decipher what the cable names mean on a surface level in order to make sense of its application uses. To learn more, view our full section on SVT cable  and SJT cord.

1 comments on article "Allied Encyclopedia: Type SJT Cord vs SVT Cable"


7/24/2015 5:18 PM

This information is much appreciated. It was surprisingly difficult to find the meaning of these designations.

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