Dayton
Dayton 30PT55 General Purpose Motor 1/3 hp 1725 RPM 48Z
Single-phase capacitor-start/run motor delivers 1/3 hp at 1,725 RPM with 48Z frame, 115/230 V operation and continuous duty rating
- ColorTransparent
- 1/3 hp output for light-duty applications
- 1725 RPM nameplate speed suits fan and pump loads
- Dual-voltage 115/230 V AC wiring flexibility
- Auto thermal protection prevents overheating damage
- Open drip-proof enclosure rated for 40 °C ambient
General-purpose motor for 115/230 V applications
This single-phase capacitor-start/run motor delivers 1/3 hp at 1,725 RPM in a 48Z frame. It is built for continuous duty at up to 40 °C ambient temperature and carries a 1.35 service factor. The design suits HVAC and general-purpose equipment that requires reliable, single-speed operation on 60 Hz supply.
Thermals and power draw in normal use
Full-load current is 3.8 A at 115 V or 1.9 A at 230 V, with automatic thermal protection to interrupt operation if temperatures exceed safe limits. The open drip-proof enclosure allows airflow for cooling while protecting internal parts from falling moisture. Insulation class B supports the rated temperature rise during continuous running.
Cradle-base mounting and shaft flexibility
A horizontal cradle base provides stable mounting on flat surfaces and the shaft rotates in either clockwise or counter-clockwise direction to match driven equipment. The motor is not inverter rated, so it should be powered directly from the mains supply without a variable-frequency drive. Dual-voltage wiring lets installers select 115 V or 230 V at the terminal block.
Highlights
- 1/3 hp output for light-duty applications
- 1725 RPM nameplate speed suits fan and pump loads
- Dual-voltage 115/230 V AC wiring flexibility
- Auto thermal protection prevents overheating damage
- Open drip-proof enclosure rated for 40 °C ambient
Specifications
| Brand | DAYTON |
|---|---|
| Color | Transparent |
Questions about this item
How do I wire the 115/230 V capacitor-start motor and which step is often missed?
Connect the supply to the dual-voltage terminals matching 115 V or 230 V, then verify rotation is CW or CCW as needed; the step most often missed is changing the internal voltage links before applying power.
What maintenance will the open drip-proof 48Z frame motor need over time?
Periodically clean dust from the open vents, check the cradle-base bolts for tightness, and listen for bearing noise; the auto thermal protection resets itself but repeated trips mean the load or ventilation must be corrected.
At what point does the 1.35 service factor limit appear during continuous duty?
The 1.35 service factor allows brief overloads, but sustained operation above 1/3 hp at 40 °C ambient will trip the auto thermal protection first, signalling the practical continuous limit.
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