Marathon
Marathon W555A - 20 HP, TEFC, Frame 286T
Model: W555A

Marathon W555A motor — 20 HP, 3-phase, 460 V, 1200 RPM, 286T frame, TEFC, 91.7% efficiency.
Technical Specifications
| Horsepower (HP) | 20 |
| Frame Size | 286T |
| Enclosure | TEFC |
| Full Load Speed (RPM) | 1200 |
| Voltage | 460 |
| Phase | 3 |
| Full Load Amps (A) | 26.0 |
| Weight (lbs) | 489 |
| Category | Severe Duty |
| Electrical Type | AC Induction |
| Rotation | CW/CCW |
| Frequency | 60 |
| Efficiency (%) | 91.7 |
| Shaft Diameter | 1.875 |
| Shaft Diameter Source | NEMA MG-1 frame table |
| Mounting Type | Foot Mounted |
| Mounting Type Source | Marathon 2026 Catalog p.57 |
| Duty Type | General Purpose |
Manufacturer

Marathon
A Regal Rexnord brand manufacturing industrial-grade electric motors. Known for Blue Chip XRI, Black Max, and severe duty product lines.
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