Technical References
for Your Convenience

Glossary of Wire Type Terminology

  • Flat Wire: SPT: Stranded, Parallel, Thermoplastic
    This is always followed by a -1, -2 or -3, signifying insulation thickness for different applications.
  • HPN: Heater, Parallel, Neoprene
    Required for heater-type application, such as irons, toasters, etc.
    NOTE: Electri-Cord can run some 20 AWG, but mostly we run 18, 16 and 14 AWG, 2 or 3 conductors.
  • P = Parallel Wire (Flat).

Jacketed Wire:

  • S = Stranded (or Service Wire)
  • J = Junior Service (300 Volt). If no “J” is in the wire type, then it is a hard service (600 Volt).
  • T = Thermoplastic. If no “T” is in the wire type, then it has a rubber jacket.
  • O = Oil-Resistant Compound
  • W = Weather-Resistant Compound
  • V = Vacuum (as in vacuum cleaner). This is a small O.D. jacketed wire, very flexible and initially used for vacuum cleaners but now used on many different types of products. Available only in 18 AWG.

Examples:

  • SV = Stranded Vacuum Rubber Jacketed (NO “T”)
  • SJT = Stranded Junior Thermoplastic
  • SJTOW = Stranded Junior Thermoplastic, Oil and Weather resistant for UL and CSA.

Miscellaneous requirements:

  • S.P. = Surface Printed
  • N.M. = Non-Migratory compound to prevent the wire color from bleeding under unusual circumstances.
  • VW-1 = Vertical Flame test (formerly FR-1)
  • IEC, ICC = International Color Code on the inner conductors (Blue, Brown, Green w/Yellow Stripe)
  • N.A. = North American Color Code on the inner conductors (Black, White, Green)
  • 41/34 = Stranding specification format (41 strands of 34 AWG wire for each inner conductor)
  • T.C. = Tinned Copper inner conductors
  • RIBBED = Outer jacket is striated with ribs
  • R/S or W/S = Red or White Stripe for visual polarity inspection on Flat wire

Temperature Ratings:

  • 60°C = Standard rating (except HPN =90°C)
  • 105°C = Electri-Cord’s alternate rating
    (we normally don’t stock 75°, 90°C)

 

Inner Conductor Colors

Function North American (NA) International (ICC)
Hot Black Brown
Neutral White Blue
Earth (Ground) Green Green w/Yellow Stripe

Metric Conversion Chart:

Metric Conversion Chart
Metric to Standard Standard to Metric
25.4 mm per inch
305 mm per foot
.305 M per foot
1.61 KM per mile
.03937 inches per mm
39.37 inches per meter
3.28 feet per meter
.622 miles per KM
In. Dec. mm   In. Dec. mm   In. Dec. mm
1/32 .031 .793 11/32 .343 8.731 11/16 .687 17.462
1/16 .062 1.587 3/8 .375 9.525 23/32 .718 18.256
3/32 .093 2.381 13/32 .406 10.318 3/4 .750 19.050
1/8 .125 3.175 7/16 .437 11.112 25/32 .781 19.843
5/32 .156 3.968 15/32 .468 11.906 13/16 .812 20.637
3/16 .187 4.762 1/2 .500 12.700 27/32 .843 21.431
7/32 .218 5.556 17/32 .531 13.493 7/8 .875 22.225
1/4 .250 6.350 9/16 .562 14.287 29/32 .906 23.018
9/32 .281 7.143 19/32 .593 15.081 15/16 .937 23.812
5/16 .312 7.937 5/8 .625 15.875 31/32 .968 24.606
21/32 .656 16.668 1 1.000 25.400