Glossary

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 11/32.3438.731 11/16.68717.462
1/16.0621.587 3/8.3759.525 23/32.71818.256
3/32.0932.381 13/32.40610.318 3/4.75019.050
1/8.1253.175 7/16.43711.112 25/32.78119.843
5/32.1563.968 15/32.46811.906 13/16.81220.637
3/16.1874.762 1/2.50012.700 27/32.84321.431
7/32.2185.556 17/32.53113.493 7/8.87522.225
1/4.2506.350 9/16.56214.287 29/32.90623.018
9/32.2817.143 19/32.59315.081 15/16.93723.812
5/16.3127.937 5/8.62515.875 31/32.96824.606
    21/32.65616.668 11.00025.400