You cannot determine how to wire an old Westinghouse motor from the brand name alone. The safe connection depends on the exact motor’s nameplate and its own wiring diagram, typically on the nameplate or inside the connection box. Do not apply power until you have identified the motor and confirmed its diagram. If the markings are missing, unreadable, contradictory, or the motor has been modified, have a qualified electrician or motor repair shop identify it.
What to identify before wiring
Record and photograph the complete nameplate and connection box before changing any connections. Nameplate information helps establish electrical performance and physical dimensions relevant to installation and replacement, but formats vary by manufacturer. See ABB’s guide to reading a NEMA motor nameplate.
- Complete model and serial information
- Phase, rated voltage, and frequency
- Horsepower and speed
- Every terminal or lead marking
- Existing links, wiring, capacitor labels, and any other components in the connection box
“Old Westinghouse motor” is not enough information to determine a lead-to-line connection. Wire colors and diagrams from similar-looking motors are not reliable substitutes for this motor’s own markings and instructions.
Safe identification-first workflow
- Isolate the power. Disconnect the supply before working on the motor or opening its connection box, and use suitable procedures to prevent accidental re-energization and verify that the equipment is de-energized. A pump owner manual gives the instruction, “Disconnect power to motor before working on pump or motor.”
- Document what is present. Photograph the nameplate, connection box, terminal markings, links, capacitor labels, and existing wiring before disturbing connections.
- Read the motor’s actual ratings and markings. Note the phase, voltage, frequency, horsepower, speed, and lead or terminal labels. Do not infer connections from color or another motor’s diagram.
- Find the exact connection diagram. Use the diagram on this motor’s nameplate or in its connection box, or an applicable manufacturer document for the exact model. Westinghouse’s Documents and Manuals index provides a route to product documents, but the brand and age alone do not identify an applicable manual.
- Stop if identification is uncertain. If the nameplate or diagram is missing, illegible, contradictory, or the motor appears altered, do not guess or energize it. Ask a qualified electrician or motor repair shop to identify it.
Grounding and installation
Follow the grounding instructions for the exact motor and comply with applicable electrical codes. The pump manual cited above says to ground the motor before connecting it to the power supply and directs readers to follow the motor’s nameplate or connection-box diagram when its illustration does not match. These are general manual instructions, not a wiring diagram for an unidentified Westinghouse motor.
#1 Best Overall
- 【Product Specifications】Upgrade your HVAC system with this versatile 1/3 HP fan and blower motor. It operates at 1725 RPM on 115V, 6.0 Amps, 60Hz. Features reversible rotation, a 1/2" shaft diameter, and a 5-5/8" diameter frame (48 Frame). Built with Class B insulation and thermal protection for reliable, safe operation
- 【Wide Compatibility - Replaces A.O. Smith, Emerson, GE & More】Stop searching for the exact model number. This blower motor directly replaces A.O. Smith GF2034; Emerson 8100; GE BF-4706, NBK20598; Grainger 3K384, 6K778; Universal 805; Baldor RSP2442A; Packard 45013, 44706, 4406; Fasco D6004; Mars 04706, 10304, 10406; Smart Electric 235279; Marathon 4734, S106; Rotom BF4706, T5-R841; US Motors 8100; Source 1 S1-02431418000; Carrier HC41DE114, HC41DX115; and more
- 【Compatible with Century & Additional Popular Models】Also designed to replace Century models: 316P169, 316P175, 316P308, 316P309, 316P750, 316P759, 316P817, 48S17D11042A, 325P582, S48A74A02, S48H4LA11A2, S48H4LA11A3, S48H4LA59. Perfect for residential and light commercial HVAC systems. Always verify your original motor's specs for a perfect match
- 【Reversible Rotation for Versatile Airflow】Engineered for maximum flexibility. This motor features reversible rotation, allowing you to easily adapt airflow direction for various HVAC applications, including furnaces, air handlers, and ventilation systems. The 1/2" shaft and 48 Frame design ensure a perfect fit for most standard blower assemblies
- 【Quiet Operation & Durable Construction】Experience the difference a quality motor makes. Engineered for smooth, quiet operation, it significantly reduces vibration and noise compared to standard motors. Built with high-quality materials, all-copper windings, and a rugged 48 Frame housing, it's designed to resist wear and tear, providing reliable service for years to come
Terminal rules can also depend on equipment connected to the motor. For example, Yaskawa’s drive documentation distinguishes drive supply terminals from motor terminals and gives context-specific grounding warnings. Those drive instructions are not wiring directions for this motor.
What a current check can—and cannot—tell you
A clamp meter does not identify unknown motor leads or make an uncertain connection safe. After the motor and installation have been correctly identified, a qualified person may use an appropriate clamp meter for a three-phase current check. A Pumpa Blue Line manual recommends checking that the draws on all three phases are balanced and do not exceed the values on the motor type plate. That is a diagnostic check, not a method for choosing wiring connections.
Rank #2
- --- Fans & Blowers --- Compressors --- Pumps
- TEFC - NEMA PREMIUM EFFICIENCY
- 3 HP, 1800 RPM, TEFC Enclosure, 182T Frame, 208-230/460 Volt, 3 Phase
If you are replacing the motor
Do not choose a replacement based on the Westinghouse name or horsepower alone. Compare the original motor and the proposed replacement against the application and installation: phase, supply voltage and frequency, horsepower, speed or poles, frame and shaft or mounting fit, enclosure and environment, duty, and the applicable connection diagram. The original motor’s nameplate and physical fit must be established before a compatible replacement can be identified.
Quick Recap
Best Value
- High Performance: 2HP SPL 3450 RPM, Single Phase, Full Load Amps: 20/10 Amps, 115V/230V, SF: 1.0.
- Frame Type: 56 Frame, 5/8" Keyed shaft, 1.88" Shaft length, 0.188" Keyway Size.
- Open Drip-proof: Suggest using in clean and dry environments. Made of high-quality steel material, it can protect the engine, longer service life.
- Dual Rotation Direction: Motor is Reversible for CCW/CW rotation (Factory Setting is CCW), provides easier wiring operations.
- Safe & Durable: Tested with CSA certification. A sturdy steel frame, fast heat dissipation and compatible keyed shaft for longtime usage.
Rank #4
- Specifications - Single phase agricultural motor, runs at 1HP voltage 115V/230V 13.6/6.8A CW/CCW
- Parameters - 56 Frame, 5/8 keyed shaft, 1.15 shaft length
- Power - The speed of the motor can reach 1725 rpm, with good working efficiency and stable operation
- Advantages - The motor provides reversible clockwise/counterclockwise rotation, providing fast and multifunctional connection for various application
- Application - The motor has universal applicability and can be used in water pumps and agriculture
Rank #3
- Product Introduction: CHIOWO GF2024 1/4 hp blower motor compatible with AO SMITH HAVC system, direct replacement. Design upgrade, provide smooth, quiet performance and high-efficiency
- Motor Parameters: It is 1/4 HP, 115 V, 5.0 A, 60 HZ, 1725 rpm, rotation reversible
- Dimensions: This Motor is 5-5/8" Diameter 48 Frame, 1/2" Shaft Diameter
- Replacement &Compatible Models: AO Smith GF2024 BF2024, Packard 45014, GE BF4701, USMotor EM-2889, Emerson 8000, Marathon B303 B206, Rotom BF-4701
- Excellent performance: Our products are made of high quality materials, provide smooth, quiet performance with its 1/4 hp strong power and 1725 rpm speed, reducing noise and vibration in your HVAC system. Prevents overheating and electrical issues, ensuring long-lasting reliability in electric motor parts
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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