Power Cable Jacket Types Explained

P010-012

SJT Jacket

If you’ve been looking for a new or replacement detachable power cable, you might have seen an alphabet soup of abbreviations for the cable jacket type. Understanding these abbreviations will help you choose the correct power cable for your application.

Each of these letters designates a usage rating derived from the National Electrical Code. Here is the most common nomenclature used for power cable jackets:

  • S – Service Grade (Extra-Hard Service Grade if not followed by J, V or P); normally rated to 600V
  • J – Junior Grade; a “J” cord is rated for hard service up to 250-300V
  • V – Vacuum Cleaner Cord; light-duty cable
  • P – Parallel Cord; light-duty zip cord
  • T – Thermoplastic; most often polyvinyl chloride (PVC)
  • E – Elastomer; a copolymer that adds flexibility, especially in sub-freezing conditions
  • O – Oil-Resistant outer jacket
  • W – Outdoor; stands up to moisture and sunlight

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P006-003-HG10

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