Table
IEC vs NEMA Motor Frame
IEC vs NEMA Motor Frame lookup table with assumptions and boundary notes.
Scope
Motor frame planning only. It does not approve a motor replacement, shaft fit, base fit, enclosure, efficiency class, or certification match.
Lookup table
Compare common IEC and NEMA motor frame labels by rough shaft-height and mounting-context source links.
Scroll sideways to keep row labels aligned with hidden columns.
| Frame label | Nearest counterpart | Shaft height (mm) | Mounting context | Boundary |
|---|---|---|---|---|
| IEC 80 | NEMA 56C | 80 | small metric frame lookup | frame comparison planning only; manufacturer dimension drawings govern fit and replacement |
| IEC 90S | NEMA 143T | 90 | common small industrial frame lookup | frame comparison planning only; manufacturer dimension drawings govern fit and replacement |
| 143T | IEC 90S | 90 | common NEMA-to-IEC frame lookup | frame comparison planning only; manufacturer dimension drawings govern fit and replacement |
| 145T | IEC 90L | 90 | common NEMA-to-IEC frame lookup | frame comparison planning only; manufacturer dimension drawings govern fit and replacement |
| IEC 100L | NEMA 182T | 100 | mid-size metric frame lookup | frame comparison planning only; manufacturer dimension drawings govern fit and replacement |
| 184T | IEC 112M | 112 | mid-size NEMA frame lookup | frame comparison planning only; manufacturer dimension drawings govern fit and replacement |
Notes
- Check table values for preliminary lookup and arithmetic checks only.
- Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.