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Test Procedure Rulemaking for

Electric Motors – Proposed Rule

July 16, 2013

Department of Energy

Building Technologies Program

EERE-2012-BT-TP-0043

ElectricMotors2012TP0043@ee.doe.gov
2

Welcome

• Introductions (around the room)

• Role of the Facilitator

• Ground Rules

– Speak one at a time.

– Say your name for the record – there will be a complete transcript of 

this meeting.

– Be concise – share the ‘air-time’.

– Keep the focus here – cell phones on silent; limit sidebar 

conversations.

– Webinar participants turn phone on mute; “raise your hand” to be 

recognized to speak.

• Housekeeping Items

• Agenda Review

• Opening Remarks
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Agenda

9:00 – 9:25 am Welcome, Introductions, Opening Statements, 

Overview, Statute, Context

9:25 – 9:45 am History of Rulemaking

9:45 – 12:45 pm New Motors Definitions and Testing Instructions

12:45 –1:00 pm Closing Remarks and Adjourn
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Listening Via the Webcast

• The Department is broadcasting this meeting live over the 

Internet.

• DOE is providing the webcast to accommodate stakeholders 

that are unable to attend the public meeting in person.

• The web broadcast allows stakeholders to listen in and view 

the slides.

• All stakeholders are encouraged to submit written comments 

after the public meeting.
5

Purpose of the Public Meeting

• Present DOE’s proposed test procedures and definitions for 

electric motors.

• Invite comment on the notice of proposed rulemaking 

(NOPR) document. 

• Discuss next steps in the rulemaking.

• Invite participants to provide summary comments or 

statements and raise additional issues for discussion. 
6

Issues for Discussion

Issue box numbering corresponds to the list of issues published 

at the end of the NOPR document, available at: 

http://www.regulations.gov/#!docketDetail;D=EERE-2012-BTTP-0043

The deadline for submitting comments is September 9, 2013.

Issue Box: DOE welcomes comments, data, and 

information concerning its proposed test procedure 

for electric motors. Issues that correspond to those 

raised in DOE’s published material will be numbered 

in accordance with that material. Whether invited by 

an issue box or not, comments are welcome on any 

part of DOE’s analysis.
7

Opening Remarks

Meeting participants are invited to provide opening remarks or 

statements at this time.
8

Presentation Overview

1 Background 

2 Test Procedure Applicability

3 Motor Type Definitions

4 Motors With New Testing Instructions

5 Motor Definitions with Testing Instructions

6 Motors Requiring General Clarification
9

History of Rulemaking

• On May 4, 2012 DOE published a final rule updating test 

procedures for small electric motors and electric motors. 

This rulemaking accomplished the following:

• Clarified the scope of coverage following the new energy 

conservation standards established by EISA 2007.

• Updated the underlying test methodologies from IEEE and CSA to 

the most recent versions. 

• DOE initiated a rulemaking for motors by publishing a 

September 2010 framework followed by a request for 

information (RFI) in March 2011.

• In response to comments on the September 2010 framework 

and the March 2011 RFI, DOE believes it is necessary to 

clarify the existing test procedures and definitions for certain 

covered motor types.
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Test Procedure Rulemaking Process

NOPR

Today

Final

Rule

Milestone Date

Notice of Proposed Rulemaking (NOPR) Publication June 26, 2013

NOPR Public Meeting July 16,2013

Comment Period Ends September 9, 2013

Final Rule Publication (projected) December 2013
11

Presentation Overview

1 Background 

2 Test Procedure Applicability

3 Motor Type Definitions

4 Motors With New Testing Instructions

5 Motor Definitions with Testing Instructions

6 Motors Requiring General Clarification
12

Test Procedure Applicability Overview

• DOE’s proposed test procedure is applicable to motors that 

meeting the following characteristics:

• single-speed, induction motor;

• rated for continuous duty (MG1) operation or for duty type S1 (IEC);

• contains a squirrel-cage (MG1) or cage (IEC) rotor;

• operates on polyphase alternating current 60-hertz sinusoidal line 

power;

• is rated 600 volts or less;

• has a 2-, 4-, 6-, or 8-pole configuration;

• has a three-digit NEMA frame size (or IEC metric equivalent) or an 

enclosed 56 NEMA frame size (or IEC metric equivalent);

• is rated no more than 500 horsepower, but greater than or equal to 1 

horsepower (or kilowatt equivalent); 

• meets all of the performance requirements of one of the following 

motor types: a NEMA Design A, B, or C motor or an IEC design N or H 

motor.
13

Test Procedure Applicability Overview

• DOE is proposing definitions in this rulemaking to clarify the 

applicability of the existing test procedure to a variety of 

covered motor types.

• In addition, DOE is proposing definitions to clarify the motor 

types that DOE has tentatively decided not to consider adding 

proposals for testing.

• Air-over electric motor;

• Component set;

• Liquid-cooled electric motor;

• Submersible electric motor; and

• Definite-purpose inverter-fed electric motor.
14

Air-Over Electric Motor

• DOE proposes to adopt the following definition:

• Air-over electric motor means a motor designed to be cooled by a 

ventilating means external to, and not supplied with, the motor. 

Issue 22: DOE requests comment on its proposed 

definition for air-over electric motor, and the decision 

to include both open and enclosed motors under the 

same definition. 
15

Component Set of an Electric Motor

• DOE proposes to adopt the following definition:

• Component set means a combination of motor parts that require 

the addition of more than two endshields to create an operable 

motor. These parts may consist of any combination of a stator 

frame, wound stator, rotor, shaft, or endshields. For the purpose 

of this definition, the term “operable motor” means an electric 

motor engineered for performing in accordance with nameplate 

ratings.

Issue 24: DOE requests comment on its proposed 

definition of component set of an electric motor. 
16

Liquid-cooled Electric Motor

• DOE proposes to adopt the following definition:

• Liquid cooled electric motor means a motor that is cooled by 

circulating liquid or liquid-filled conductors coming in direct 

contact with the machine parts. 

Issue 26: DOE seeks feedback on its proposed 

definition for liquid-cooled electric motors. 
17

Submersible Electric Motor

• DOE proposes to adopt the following definition:

• Submersible electric motor means an electric motor designed for 

continuous operation only while submerged in liquid. 

Issue 28: DOE requests comment on its proposed 

definition of submersible electric motor. 
18

Definite-Purpose Inverter-Fed Electric Motors

• DOE proposes to adopt the following definition:

• Definite-purpose, inverter-fed electric motor means a motor that 

is designed for operation solely with an inverter, and is not 

intended for operation when directly connected to polyphase 

sinusoidal line power. 

Issue 31: DOE requests comment on its proposed 

definition for definite-purpose, inverter-fed electric 

motors. 
19

Presentation Overview

1 Background 

2 Excluded Motor Types

3 Motor Type Definitions

4 Motors With New Testing Instructions

5 Motor Definitions with Testing Instructions

6 Motors Requiring General Clarification
20

NEMA Design A Electric Motor

• DOE proposes to adopt the following definition:

• NEMA Design A motor means a squirrel cage motor that is:

• Designed to withstand full-voltage starting and developing lockedrotor torque as shown in NEMA MG 1-2009, paragraph 12.38;

• Pull-up torque as shown in NEMA MG 1-2009, paragraph 12.40;

• Breakdown torque as shown in NEMA MG 1-2009, paragraph 12.39;

• With a locked-rotor current higher than the values shown in NEMA 

MG 1-2009, paragraph 12.35.1 for 60 hertz and NEMA MG 1-2009, 

paragraph 12.35.2 for 50 hertz; and

• Has a slip at rated load of less than 5 percent for motors with fewer 

than 10 poles. 

• DOE is not proposing any test procedure amendments for 

NEMA Design A electric motors at this time.
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NEMA Design C Electric Motor

• DOE proposes to adopt the following definition:

• NEMA Design C motor means a squirrel-cage motor that is:

• Designed to withstand full-voltage starting and developing lockedrotor torque for high-torque applications up to the values shown in 

NEMA MG 1-2009, paragraph 12.38;

• Pull-up torque as shown in NEMA MG 1-2009, paragraph 12.40;

• Breakdown torque up to the values shown in NEMA MG 1-2009, 

paragraph 12.39;

• With a locked-rotor current not to exceed the values shown in NEMA 

MG 1-2009, paragraphs 12.35.1 for 60 hertz and 12.35.2 for 50 

hertz; and 

• Has a slip at rated load of less than 5 percent. 

• DOE is not proposing any test procedure amendments for 

NEMA Design C electric motors at this time.
22

NEMA Design A and Design C Motors

Issue 1: DOE requests comment the proposed 

definitions for NEMA Design A and NEMA Design C 

motors that are generally based on the definitions 

from NEMA MG 1-2009. 
23

IEC Design N Electric Motor

• DOE proposes to adopt the following definition:

• IEC Design N motor means an electric motor that:

• Is an induction motor designed for use with three-phase power;

• Contains a cage rotor;

• Is intended for direct-on-line starting (as demonstrated by the 

motor’s ability to operate without an inverter);

• Has 2, 4, 6, or 8 poles;

• Is rated from 0.4 kW to 1600 kW; and

• Conforms to sections 6.1, 6.2, and 6.3 of the IEC 60034-12 edition 

2.1 requirements for torque characteristics, locked rotor apparent 

power, and starting. 

• DOE is not proposing any test procedure amendments for 

IEC Design N electric motors at this time.
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IEC Design H Electric Motor

• DOE proposes to adopt the following definition:

• IEC Design H motor means an electric motor that:

• Is an induction motor designed for use with three-phase power;

• Contains a cage rotor;

• Is intended for direct-on-line starting (as demonstrated by the 

motor’s ability to operate without an inverter);

• Has 2, 4, 6, or 8 poles;

• Is rated from 0.4 kW to 1600 kW at a frequency of 60 Hz; and

• Conforms to sections 8.1, 8.2, and 8.3 of the IEC 60032-12 edition 

2.1 requirements for torque characteristics, locked rotor apparent 

power, and starting. 

• DOE is not proposing any test procedure amendments for 

IEC Design H electric motors at this time.
25

IEC Design H and Design N Electric Motor

Issue 2: DOE requests comment on the proposed 

definitions for IEC Design N and H motors. 
26

Electric Motors with Moisture Resistant Windings

• DOE proposes to adopt the following definition:

• Electric motors with moisture resistant windings means: 

• an electric motor that is designed to pass the conformance test for 

moisture resistance described in NEMA MG 1-2009, paragraph 12.63 

as demonstrated on a representative sample or prototype.

• DOE is not proposing any test procedure amendments for 

electric motors with moisture resistant windings at this time.
27

Electric Motors with Sealed Windings

• DOE proposes to adopt the following definition:

• Electric motors with sealed windings means:

• an electric motor that is designed to pass the conformance test for 

water resistance described in NEMA MG 1-2009, paragraph 12.62 as 

demonstrated on a representative sample or prototype. 

• DOE is not proposing any test procedure amendments for 

electric motors with sealed windings at this time.

Issue 3: DOE seeks comment on its proposed 

definition for electric motors with moisture resistant 

windings and electric motors with sealed windings 

and its preliminary decision not to propose any test 

procedure amendments at this time. 
28

Inverter-Capable Electric Motor

• DOE proposes to adopt the following definition:

• Inverter-capable electric motor means:

• an electric motor designed to be directly connected to polyphase, 

sinusoidal line power, but which is also capable of continuous 

operation on an inverter drive over a limited speed range and 

associated load.

• DOE is not proposing any test procedure amendments for 

inverter-capable electric motors at this time.

Issue 4: DOE requests comment on its proposed 

definition for inverter-capable electric motors and its 

tentative decision not to propose any test procedure 

amendments for inverter-capable electric motors. 
29

Totally Enclosed Non-ventilated (TENV) electric motor

• DOE proposes to adopt the following definition:

• Totally enclosed non-ventilated (TENV) electric motor means:

• a motor that is built in a frame-surface cooled, totally enclosed 

configuration that is designed and equipped to be cooled only by 

free convection.

• DOE is not proposing any test procedure amendments for 

TENV electric motors at this time.

Issue 5: DOE requests comments on its proposed 

definition and preliminary decision not to propose 

any test procedure amendments for TENV electric 

motors. 
30

Presentation Overview

1 Background 

2 Test Procedure Applicability

3 Motor Type Definitions

4 Motors With New Testing Instructions

5 Motor Definitions with Testing Instructions

6 Motors Requiring General Clarification
31

Electric Motors with Non-Standard Endshields or Flanges

• DOE proposes to add the following testing instructions: 

• If a situation arises where motors with non-standard endshields 

cannot be attached to a testing laboratory’s dynamometer, DOE 

proposes that the custom endshield be replaced with one that 

has standard dimensions and mounting configurations.

• This replacement must be obtained through the manufacturer 

and be constructed of the same material as the original endplate. 

Issue 11: DOE invites comment on its proposed 

instructions for testing electric motors with nonstandard endshields or flanges. 
32

Electric Motors with Non-Standard Shaft Dimensions

• DOE is not aware of any motor shaft design that has 

prevented DOE’s test laboratory from performing a proper 

test according to IEEE 112 Test Method B.

• DOE understands that a motor’s shaft configuration has 

minimal, if any, impact on overall motor efficiency.

• DOE proposes to add the following testing instructions: 

• If a testing facility cannot attach a motor to its dynamometer 

because of the motor’s shaft extension, that facility should use a 

coupling or adapter to mount and test the motor. 

Issue 13: DOE requests comments comment on its proposed 

instructions for testing motors with non-standard shaft 

dimensions. 
33

Vertical Electric Motors

• DOE proposes to add the following testing instructions: 

• Electric motors which are otherwise designed to operate 

vertically, will be tested horizontally.

• For solid shaft motors, no further adjustments are needed.

• For hollow shaft motors, DOE believes that an attached solidshaft extension is a feasible approach as long as the attachment 

maintains sufficient clearance through the drive end of the motor 

to enable the motor to be attached to the dynamometer. 

• DOE does not anticipate that testing a vertical hollow-shaft motor in 

a horizontal configuration would add undue testing burden when 

compared to testing a solid-shaft vertical motor. 

• DOE is declining to propose the use of Test Method E for 

vertical motors. 

• DOE is concerned that Test Method E could produce results that 

are inconsistent and inaccurate relative to testing comparable 

motors under Test Method B. 
34

Vertical Electric Motors

Issue 19: DOE seeks comments on its proposed 

instructions for dealing with the various construction 

differences found between vertical and horizontal 

motors. 
35

Bearings on Vertical Electric Motors

• DOE proposes to add the following testing instructions: 

• For motor bearings that can only operate vertically, and testing 

horizontally would cause problems for the motor, a testing 

laboratory should replace the thrust bearing with a “standard 

bearing” which shall be interpreted as a 6000 series, open, singlerow, deep groove, radial ball bearing.

• For any motor with bearings that are capable of operating 

properly when the motor is tested horizontally the motor should 

be tested as is. 

Issue 17: DOE requests comment regarding its 

proposed approach to testing electric motors with 

bearings capable of horizontal orientation. DOE also 

requests comment on its proposed approach to 

testing electric motors with bearings not capable of 

horizontal orientation. 
36

Bearings on Vertical Electric Motors

• DOE does not propose to add testing instructions for sleeve 

bearings:

• DOE does not believe that it is any more difficult to attach a 

motor with sleeve bearings to a dynamometer than a standard 

general purpose electric motor equipped with radial ball 

bearings. Motors with sleeve bearings will be tested as is. 

Issue 20: DOE requests comment on its decision not 

to propose additional test procedure clarifications 

for motors with sleeve bearings or a definition for 

these motor types. 

Issue 21: DOE requests comment regarding the effect 

of sleeve bearings on a motor’s tested efficiency. 
37

Presentation Overview

1 Background 

2 Test Procedure Applicability

3 Motor Type Definitions

4 Motors With New Testing Instructions

5 Motor Definitions with Testing Instructions

6 Motors Requiring General Clarification
38

Immersible Electric Motor

• DOE proposes to adopt the following definition:

• Immersible electric motor means:

• an electric motor primarily designed to operate continuously in freeair, but is capable of withstanding complete immersion in liquid for a 

continuous period of no less than 30 minutes. 

Issue 8: DOE requests comments on its proposed 

definition for immersible electric motor, especially 

with regards to differentiating this motor type from 

liquid-cooled electric and submersible electric 

motors. 
39

Immersible Electric Motor

• DOE proposes to adopt the following test instructions:

• Contact seals will not be removed during testing, but DOE will 

allow for a run in period of a maximum of 10 hours prior to 

performing IEEE Standard 112 (test method B).

Issue 9: DOE invites comment on its proposed test 

procedure instructions for immersible electric 

motors, in particular, the proposal to allow for 

maximum run-in period of 10 hours prior to testing 

according to IEEE Standard 112 Test Method B.
40

Integral Brake Electric Motor

• DOE proposes to adopt the following definition:

• Integral brake electric motor means: 

• an electric motor containing a brake mechanism either inside of the 

motor endshield or between the motor fan and endshield

Issue 6: DOE requests comments on its proposed 

definition of integral brake electric motor.
41

Integral Brake Electric Motor

• DOE proposes to adopt the following test instructions:

• The brake mechanism will stay attached during motor testing but 

will be powered externally while performing IEEE standard 112 

(test method B). 

Issue 7: DOE requests comments on its preliminary 

decision to test integral brake electric motors without 

disassembly but, rather, with their brake components 

powered externally. 
42

Non-integral Brake Electric Motor

• DOE proposes to adopt the following definition:

• Non-integral brake electric motor means:

• an electric motor containing a brake mechanism outside of the 

endshield, but not between the motor fan and endshield. 

Issue for comment: DOE requests comment on its 

proposed definition of non-integral brake electric 

motor. 
43

Non-integral Brake Electric Motor

• DOE proposes to adopt the following test instructions:

• The brake mechanism will stay attached during motor testing but 

will be powered externally while performing IEEE standard 112 

(test method B). 

Issue 7: DOE requests comments on its preliminary 

decision to test non-integral brake electric motors 

without disassembly but, rather, with their brake 

components powered externally.
44

Partial Electric Motors

• DOE proposes to adopt the following definition:

• Partial electric motor means:

• an assembly of motor components necessitating the addition of no 

more than 2 endshields, including bearings, to create an operable 

motor. For the purpose of this definition, the term “operable 

motor” means performing in accordance with the applicable 

nameplate ratings. 

Issue for comment: DOE requests comments on its 

proposed definition of partial electric motor.
45

Partial Electric Motors

• DOE proposes to adopt the following test instructions:

• Testing laboratories will obtain an endplate from the 

manufacturer of the motor and test with that endplate in place. 

If bearings are also needed then “standard bearings” should be 

used, which should be interpreted as a 6000 series, open, singlerow, deep groove, radial ball bearing. 

Issue for comment: DOE requests comments on its 

preliminary proposal for testing partial electric 

motors. 
46

Presentation Overview

1 Background 

2 Test Procedure Applicability

3 Motor Type Definitions

4 Motors With New Testing Instructions

5 Motor Definitions with Testing Instructions

6 Motors Requiring General Clarification
47

Electric Motors with non-Standard Bases, Feet or Mounting Configurations

• DOE believes non-standard mounting feet present no 

additional testing issues that require additional clarification. 

• Test labs can adjust the test bench as applicable for the unit 

under test to accommodate non-standard mounting feet. 

• Feet, base, and configuration do not affect the tested 

efficiency, friction, windage losses, or any rotating elements 

of the motor. 

• Instead, the feet, base, and configuration only affects how a 

motor is physically installed in a piece of equipment. 
48

Electric Motors with non-Standard Bases, Feet or Mounting Configurations

Issue 14: DOE seeks comment on its instructions for 

testing electric motors with non-standard base, feet, 

or mounting configurations. 

Issue 16: DOE seeks comment on any other testing 

difficulties that may arise from testing electric motors 

with non-standard base, feet, or mounting 

configurations. 
49

How to Submit Written Comments

In all correspondence, please refer to the electric motors rulemaking by:

– Test Procedures for Electric Motors;

– Docket Number EERE-2012-BT-TP-0043; and

– Regulatory Identification Number (RIN) 1904-AC89.

Email: ElectricMotors2012TP0043@ee.doe.gov

Comment Period closes: September 9, 2013, 11:59 PM EDT
50

Closing Remarks/Questions