The Differences Between Power Cords’ Jackets

Have you ever noticed the combination of letters on a power cord? These letters represent the jacket type that surrounds the interior of the power cord. Understanding the jacket types will help you choose the right power cord for the right setting. If we break down the letters individually, they stand for:

  • S
    • Service Grade (also means extra hard service when not followed by J, V, or P)
  • Jcable closeup
    • Hard Service
  • E
    • Thermoplastic Elastomer (UL/NEC designation ONLY)
  • O
    • Oil Resistant
  • T
    • Thermoplastic
  • W
    • Outdoors-includes sunlight resistant jacket and wet location rated conductors

With a basic understanding of what the letters represent individually, we can now look at what they represent in a combined sequence such as in the image above.

  • SJT
    • Junior hard service, thermoplastic insulated conductors and jacket. 300V (PVC)
    • Designed for indoor use, such as for small to medium appliances and other electrical equipment
  • SJTW
    • Same as SJT, but outdoor rated. (PVC)
    • Weather resistant and designed for outdoors. It is typically used for portable tools and lighting, office equipment, fans, and floor care/hospital equipment
  • SJTO
    • Same as SJT, but oil resistant outer jacket. (PVC)
    • Commonly used for portable tools, motors, hospital and sound equipment, washing machines, and portable lighting
  • SJTOW
    • Same as SJTO, except outdoor rated. (PVC)
    • Commonly used for portable equipment, appliances, and robotic systems
  • ST
    • Hard service cord with all thermoplastic construction. 600V (PVC)
    • Used mainly with heavy industrial equipment
  • STW
    • Same as ST, except outdoor rated. (PVC)
    • Also used mainly with heavy industrial equipment
    • Typically used with RV and generator power cords
  • STO
    • Same as ST, but with oil resistant outer jacket. (PVC)
    • Used for hard usage indoors such as portable tools, motors, floor maintenance equipment, hospital equipment, sound equipment, washing machines, portable lighting, lamps, etc.
  • STOW
    • Same as STO, except outdoor rated. (PVC)
    • Designed for extra hard usage with heavy tools, lights, and power extensions
    • Most marine shore power cords use this jacket type.
  • SE
    • Extra hard service cord, thermoplastic elastomer conductor insulation and jacket. 600V (TPE)
    • Designed for extra hard usage, these cords work well in damp/wet conditions
  • SEW
    • Same as SE, except outdoor rated. (TPE)
    • Designed for extra hard usage, these cords work well in damp/wet conditions
  • SEO
    • Same as SE, but with oil resistant jacket. (TPE)
    • Designed for extra hard usage, these cords work well in damp/wet conditions
  • SEOW
    • Same as SEO, except outdoor rated. (TPE)
    • Designed for extra hard usage, these cords work well in damp/wet conditions
  • SJEOW
    • Same as SEOW, but with hard service.
    • Designed for extra hard usage, these cords work well in damp/wet conditions
  • SEOO
    • Same as SE, but with oil resistant conductor insulation and jacket. (TPE)
    • Designed for extra hard usage, these cords work well in damp/wet conditions
  • SEOOW
    • Same as SEOO, except outdoor rated. (TPE)
    • Designed for extra hard usage, these cords work well in damp/wet conditions
  • S
    • Extra hard service cord, thermoset-insulated conductors and thermoset jacket. 600V
  • SO
    • Same as S, but with oil resistant jacket. (thermoset)
    • Designed for portable tools and equipment and has a temperature range of -40°C to 60°C.
  • SOW
    • Same as S, except outdoor rated. (thermoset)
    • Designed for portable tools and equipment and has a temperature range of -40°C to + 60°C.
  • SOOW
    • Same as SOW, but with oil resistant insulation covering the conductors. 600V
    • Designed for extra hard usage when flexibility and durability are needed most
    • This jacket type is commonly used in settings involving industrial equipment, large power tools, sound equipment, power extensions, marine shore power, and more.
  • SJOOW
    • Junior service cord that is similar to SOOW, but only 300V.
    • Designed for hard usage when flexibility and durability are needed most
    • This jacket type is commonly used in settings involving industrial equipment, power tools, sound equipment, power extensions, marine shore power, and more.
Advertisements
Posted in Contractor, Electric Vehicle, FAQ, Food Truck, Generator, Marine, RV

Have a comment? Leave it here!

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Categories
Follow Conntek Power Solutions Blog on WordPress.com
%d bloggers like this: