Standardization of European cable - DIN VDE 0281/DIN VDE 0282/DIN VDE 0292

Harmonized wire coding system

Example: Harmonized type, 300/500V, PVC insulating, PVC sheath- cladding, Fine wire, 3x1.5 cross-sectional: H05VVF3x1.5

Standardization of American cable

Nomenclature Key

• S: Service Grade (also means extra hard service when not followed by J, V, or P)
• J: Hard Service
• V: Vacuum cleaner cord (also light duty cable)
• P: Parallel cord (also known as zip cord) – Always light duty
• E: Thermoplastic Elastomer (UL/NEC designation ONLY)
• O: Oil Resistant*
• T: Thermoplastic
• W: Outdoor-includes sunlight resistant jacket and wet location rated conductors (formerly "W-A")
• H: Heater cable
• VW-1: Flame retardant
• FT2: Flame retardant

Definitions of Cable Types

• SVT: Thermoplastic insulated vacuum cleaner cord, with or without 3rd conductor for grounding purposes; 300V. (PVC)
• SJT: Junior hard service, thermoplastic insulated conductors and jacket. 300V. (PVC)
• SJTW: Same as SJT except outdoor rated. (PVC)
• SJTO: Same as SJT but oil resistant outer jacket. (PVC)
• SJTOW: Same as SJTO except outdoor rated. (PVC)
• ST: Hard service cord with all thermoplastic construction, 600V. (PVC)
• STW: Same as ST except outdoor rated. (PVC)
• STO: Same as ST but with oil resistant outer jacket. (PVC)
• STOW: Same as STO except outdoor rated. (PVC)