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Electric Motor Winding Standards

Riverside Winding Standards
Quality workmanship is a top priority, and we're proud to share the standards that we uphold. Each project we have is another opportunity to showcase our expertise and workmanship.

Please find our electric motor winding standards below, and contact us if you have any feedback.

Slot Cell:

  • U180- Standard for all rewinds- Class H material
  • Nomex- Customer request- Class H material- Higher temp rating
  • 007 to .015- fractional to 10HP (.015 when possible)
  • 015 to .020- above 10HP to 100HP
  • 020 100HP and above

Center Separators: (Pre- Formed FNSEP)

  • U180- Standard for all rewinds- Class H material
  • Nomex- Customer request- Class H material- Higher temp rating
  • .010- fractional to 100HP
  • Double .010 100HP and above

(Note: The above standards should be used whenever possible. If there
are space constraints that may affect the quality of the winding, thinner
material might need to be used.)

Phase Cloth:

  • VPI or Dip & Bake- VARG-.015-7-MD36
  • .015- fractional to 100HP
  • Double .015- 100HP and above
  • (Note: Needs to be used between every group)

    Tape Coil End Turns:

    • VPI or Dip & Bake- (Glass Tape)
    • 400HP and larger, 1800RPM and faster

    Surge Rope:

    • Dip & Bake- B Stage Rope- SRR (size)-(size) X-50FT (3/8”, ½”, 5/8”)
    • VPI- Dry Surge Ring Rope- LG14U-size-50FT (3/8”, ½”, 5/8”)

    2 Pole- 200HP and above

    • 300HP and above with mush winding (Any RPM)
    • All form coil

    (Note: Can use 1 to 4 per end depending on length of coil end)

    Wind Full Lap Whenever Possible

    Number All Leads

    Lead Wire Size:

    • Minimum lead wire size must equal circular mils of wires going to lead

    2 Dip & Bakes:

    • All Rewinds

    Mica Tape Recommendations:

    • Dip & Bake- Part # 77866-1x36, (¾” or 1”) or 6421300100036C
    • VPI- # 4373200075036C

    Tape Recommendations:

    • Dip & Bake- 69 Class H with silicone adhesive
    • VPI or Dip & Bake- 27 Class B with acrylic adhesive
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