Farm Duty / Industrial 1φ

Baldor-Reliance

AirCompDX - Field Reference for Air Compressor Techs
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Baldor-Reliance

Farm Duty / Industrial 1φ

Small recip compressors, 5 HP two-stage tank units.

Nameplate
Phase
Single-Phase
HP range
1/3 – 15 HP
Voltage codes
115/230 V · 230 V
NEMA frames
48 – 215T
Enclosure
ODP / TEFC
Poles / RPM
2, 4 (3450 / 1725 RPM)
Efficiency
Standard efficiency (1φ not covered by EISA)
Insulation class
B / F
Service factor
1.15
Lead connection diagrams
Single-phase capacitor-start (CW rotation)
L1 ── T1 (main)
L2 ── T4 (main)
Start winding: T5-T8 with start cap + centrifugal switch
Rotation reverse: swap T5 and T8

For CCW rotation, swap the two start-winding leads (T5↔T8), not the line leads.

Field notes
  • Capacitor-start / capacitor-run above 3 HP for higher starting torque.
  • 115 V is limited to ~2 HP due to line-current draw (>25 A FLA).

The connection charts above are the NEMA MG-1 industry-standard patterns most brands follow. Always confirm the exact chart printed inside your motor's peckerhead lid before landing leads — voltage-code and lead-tag conventions vary between OEMs and production years.