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Dayton 30PT88 open drip proof motor with cradle base

Dayton

Dayton 30PT88 motor 1-1/2 hp 3450 rpm 56 frame

SKU CH-K236-J363A

Single-phase capacitor-start/run motor delivering 1-1/2 hp at 3,450 rpm in a 56-frame open drip-proof enclosure

  • typeClosed Base
  • 1-1/2 hp capacitor-start motor powers demanding fan loads
  • 3450 rpm single-speed design delivers consistent airflow performance
  • 115/230 V dual-voltage wiring fits common residential circuits
  • 56 frame cradle-base mounting simplifies horizontal installation
  • 5 % efficiency rating reduces energy consumption during continuous duty

Motor Purpose & Fit

The Dayton 30PT88 is a 1 1/2 hp single-phase capacitor-start/run motor built for continuous duty at 3450 rpm. It suits replacement jobs on fans, blowers and similar equipment that call for a 56 frame open drip-proof unit. Buyers who need an inverter-rated motor or built-in thermal protection should look elsewhere.

Installation Notes

The cradle-base design bolts horizontally to a closed-base mounting surface using standard 56 frame hole spacing. Dual-voltage wiring at 115 or 230 V AC is selected by following the nameplate diagram; full-load current is 13.3 A at 115 V or 6.7 A at 230 V. CW/CCW rotation is reversible by swapping leads. No special tools are required, but verify shaft keyway dimensions before coupling.

Pre-Order Checks

Confirm your supply voltage matches 115/230 V at 60 Hz and that the driven load does not exceed the 1.15 service factor. Ensure ambient temperature stays at or below 40 °C and that the open drip-proof enclosure suits the installation environment. Check that the existing mounting footprint accepts a 56 frame cradle base and that shaft height aligns with the driven equipment.

Highlights

  • 1-1/2 hp capacitor-start motor powers demanding fan loads
  • 3450 rpm single-speed design delivers consistent airflow performance
  • 115/230 V dual-voltage wiring fits common residential circuits
  • 56 frame cradle-base mounting simplifies horizontal installation
  • 5 % efficiency rating reduces energy consumption during continuous duty

Specifications

BrandDAYTON
typeClosed Base

Questions about this item

How can I confirm the motor is running at the correct 3450 rpm after installation?

Use a non-contact tachometer on the output shaft; the reading should settle at 3450 rpm when the motor is at full load on 60 Hz power.

What comes in the box and what must I supply separately for this 56 frame motor?

The motor ships with its cradle base installed; you must provide mounting hardware, wiring, a suitable capacitor-start/run capacitor, and overload protection.

Should I wire the 1-1/2 hp unit for 115 V or 230 V in my workshop?

Choose 230 V to draw only 6.7 A instead of 13.3 A, reducing voltage drop and allowing smaller gauge wire for the same 1.15 service factor.

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