# Electric motor

> Electric motors to NEMA MG 1 and IEC 60034, including hazardous-area types, for pumps and fans, and what a request needs: power, voltage, speed and frame.

URL: https://jjprojectsok.com/products/electrical-instrumentation/electric-motor  
Español: https://jjprojectsok.com/es/products/electrical-instrumentation/electric-motor  
Updated: 2026-10-16

Electric motor to drive pumps, fans, compressors and other process equipment.

**In short:** Electric motor to drive pumps, fans, compressors and other process equipment. JJ Projects sources it to the specification the buyer names. Typical reference, standards: NEMA MG 1; IEC 60034.

## Specification references

- Standards: NEMA MG 1; IEC 60034
- Enclosure: As specified, including hazardous-area certified types
- Data to give: Power, voltage, frequency, speed and frame size

> Typical references only. The governing specification is the one on your purchase order or datasheet.

## Typical uses

- Driving pumps, fans, compressors and blowers
- Conveyors, mixers and other process machinery
- Replacement of existing motors with a matching frame and mounting
- Hazardous areas, using motors certified for the area classification

## What to include in a request

A request with these details can be quoted without a round of questions. Send what you have and we will ask for the rest.

1. Power in kW or hp, voltage, phase and frequency
2. Speed or number of poles, and the service factor or duty
3. Frame size and standard, NEMA or IEC, and mounting arrangement, for example foot or flange
4. Enclosure and cooling, for example TEFC or explosion-proof, and the area classification with its certificate
5. Efficiency class required and insulation class
6. Whether the motor runs on a variable frequency drive and needs inverter-duty construction
7. Accessories such as space heaters or temperature detectors, and the documents required

[Request this item](https://jjprojectsok.com/request-a-quote?item=electric-motor)

## Questions

### What is the difference between NEMA and IEC motors?

NEMA frames are sized in inches and rated in horsepower under NEMA MG 1. IEC frames are sized in millimeters and rated in kilowatts under IEC 60034. Mounting dimensions differ, so one is not a drop-in replacement for the other without checking.

### How does speed relate to poles?

Synchronous speed is 120 times the frequency divided by the number of poles. A four-pole motor has a synchronous speed of 1800 rpm at 60 Hz and 1500 rpm at 50 Hz, and the shaft turns a little slower under load.

### What should I say if the motor runs on a drive?

State that it runs on a variable frequency drive, with the speed range. Motors on drives may need an insulation system, bearing protection or separate cooling that a standard motor does not have.

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## Guides

- [How to write an RFQ for industrial materials](https://jjprojectsok.com/knowledge/how-to-write-an-rfq): What an RFQ for industrial materials must specify: item, size, schedule or class, grade, standard, quantity, MTRs, inspection, packing and Incoterm.
- [Industrial procurement process, step by step](https://jjprojectsok.com/knowledge/industrial-procurement-process): How industrial procurement works, step by step: requirement, RFQ, bid tabulation, evaluation, award, PO, expediting, inspection, logistics and delivery.

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