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This is a preview of "NEMA MG 1-2014". Click here to purchase the full version from the ANSI store.NEMA MG 1-2014Motors and Generators

This is a preview of "NEMA MG 1-2014". Click here to purchase the full version from the ANSI store.

This is a preview of "NEMA MG 1-2014". Click here to purchase the full version from the ANSI store.NEMA MG 1-2014Motors and GeneratorsPublished by:National Electrical Manufacturers Association1300 North 17th Street, Suite 900Rosslyn, Virginia 22209www.nema.org 2014 National Electrical Manufacturers Association. All rights, including translation into otherlanguages, reserved under the Universal Copyright Convention, the Berne Convention for the Protectionof Literary and Artistic Works, and the International and Pan American copyright conventions.

This is a preview of "NEMA MG 1-2014". Click here to purchase the full version from the ANSI store.NOTICE AND DISCLAIMERThe information in this publication was considered technically sound by a consensus among personsengaged in its development at the time it was approved. Consensus does not necessarily mean therewas unanimous agreement among every person participating in the development process.The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of whichthe document herein is one, are developed through a voluntary standards development process. Thisprocess brings together volunteers and/or seeks out the views of persons who have an interest in thetopic covered by this publication. Although NEMA administers the process and establishes rules topromote fairness in the development of consensus, it does not write the documents, nor does itindependently test, evaluate, or verify the accuracy or completeness of any information or the soundnessof any judgments contained in its standards and guideline publications.NEMA disclaims liability for any personal injury, property, or other damages of any nature, whetherspecial, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, useof, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty,express or implied, as to the accuracy or completeness of any information published herein, anddisclaims and makes no warranty that the information in this document will fulfill any particular purpose(s)or need(s). NEMA does not undertake to guarantee the performance of any individual manufacturer’s orseller’s products or services by virtue of this standard or guide.In publishing and making this document available, NEMA is not undertaking to render professional orother services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owedby any person or entity to someone else. Anyone using this document should rely on his or her ownindependent judgment or, as appropriate, seek the advice of a competent professional in determining theexercise of reasonable care in any given circumstance. Information and other standards on the topiccovered by this publication may be available from other sources, which the user may wish to consult foradditional views or information not covered by this publication.NEMA has no power, nor does it undertake to police or enforce compliance with the contents of thisdocument. NEMA does not certify, test, or inspect products, designs, or installations for safety or healthpurposes. Any certification or other statement of compliance with any health- or safety-related informationin this document shall not be attributable to NEMA and is solely the responsibility of the certifier or makerof the statement.

This is a preview of "NEMA MG 1-2014". Click here to purchase the full version from the ANSI store.MG 1-2014Summary of Changes, Page 1Changes made for MG 1-2014 will be unmarked in this version. Changes made forthe MG 1-2014 revision are identified here.Section I, Part 11.1Revised text, updated, and occasionally added references1.19.1.2Updated references to subsections1.19.1.3Updated references to subsections1.27.2Added footnote1.41.2Reference to added clause1.41.3Reference to added clause1.54Revised and redefinedSection I, Part 44.4.8Added subtitleSection II, Part 1010.39.1Addition of letter m to Nameplate Marking RequirementSection II, Part 1212.31Revised and added characteristics12.58.1Added references, revised determination of Motor Efficiency and Losses, deleted outdatedinformation, added footnotes12.58.2Added and revised to include Design N, Design L and Design M single-speed single-phasesquirrel-cage small motors, added efficiency levels to Table 12-1012.59Revised title to Efficiency Levels of Energy Efficient Polyphase Squirrel-Cage RandomWound Induction Motors Rated 600 Volts or Less at 60 Hz and added new paragraph12.60Revised title to Efficiency Levels of Premium Efficientcy Random Wound Electric MotorsRated 600 Volts or Less at 60 Hz12.60.1Revised title to Random Wound Electric Motor, added paragraph12.60.1.1 Added new subsection title Single-Phase Capacitor-Start Induction-Run or Capacitor-StartCapacitor-Run Small Motors and paragraph12.60.1.2 Added new subsection title Single-Phase Capacitor-Start Capacitor-Run Small Motors andparagraph12.60.1.3 Added new subsection title Polyphase Small Motors and paragraph12.60.1.4 Added new subsection title Polyphase Medium Motors and paragraph12.60.2 Revised 60 Hz Motors Rated Medium Voltage, 5000 Volts or Less (Form Wound) andparagraph12.60.3 Revised 50 Hz Motors Rated 600 Volts or Less (Random Wound), paragraph, revisedformulas, added 8 Pole category to table, revised values12.61Revised Table 12-11 title, revised Table 12-12, revised Table 12-13, deleted data inTable 12-14, added Table 12-15, added Table 12-16, added Table 12-17, added Table 12-18,added Table 12-19, added Table 12-20, added Table 12-21Section III, Part 2020.21Addition of KW Values20.21.1Addition of subtitle, addition of KW Values20.21.ARevision of referenced paragraphs20.21.BRevised paragraph, added Table 20-A20.21.CRevised paragraph, added Table 20-B20.21.C.2 Revised paragraphs, added Table 20-C20.21.C.3 Revised paragraphs, added Table 20-D20.21.C.4 Added paragraph, added Table 20-E, Table 20-F, Table 20-G20.25.1Revised Nameplate Marking requirement by the addition of l (NEMA nominal efficiency) 2014 National Electrical Manufacturers Association

This is a preview of "NEMA MG 1-2014". Click here to purchase the full version from the ANSI store.MG 1-2014Summary of Changes, Page 2Section IV, Part 3131.3.5Simplified text31.4.4.3Revised paragraph for clarification purposes 2014 National Electrical Manufacturers Association

This is a preview of "NEMA MG 1-2014". Click here to purchase the full version from the ANSI store.MG 1-2014Summary of Changes, Page 3Changes made for MG 1-2009, Revision 1-2010 are marked by an orange line tothe left of the changed materialNote: Where text has been revised in more than one version, only the most recent is color-codedExample of change made for MG 1-2009, Revision 1-2010Section I, Part 77.4.2Replaced “inches” with “mils”7.6.1Revised textFigure 7-1Renamed figure7.8.1Revised textFigure 7-6Replaced figureTable 7-1Revised table7.8.2Deleted section7.8.3Deleted section7.8.4Deleted section7.8.5Revised reference to table7.8.6Revised reference to table7.9.1Revised reference to table7.9.2Revised text and reference to table7.9.3Deleted sectionTable 7-2Deleted tableTable 7-3Deleted tableTable 7-4Added table to replace Tables 7-2 and 7-3Section II, Part 1414.48Added section 2014 National Electrical Manufacturers Association

This is a preview of "NEMA MG 1-2014". Click here to purchase the full version from the ANSI store.MG 1-2014Summary of Changes, Page 4Changes made for MG 1-2009 are marked by a red line to the left of the changedmaterialNote: Where text has been revised in more than one version, only the most recent is color-codedExample of change made for MG 1-2009Section I, Part 11.1Added: Reference to IEC 60034-30-20081.16Deleted section1.41.3Added: Premium Efficiency MotorSection I, Part 22.2Added: “To prevent confusion with the numerals 1 and 0, the letters “I” and “O” shall notbe used.”Updated footnote referencesAdded and revised markingsAdded: Reference to 2.67 for auxiliary devices2.60.1.2Revised Figure 2-48B for clarity2.67Added: Auxiliary Devices (entire section)Section I, Part 4Table 4-2Dimension revised in column 6Section II, Part 10Table 10-5Adjusted tableSection II, Part 1212.41In table, corrected synchronous speed of the 50 Hz machine12.60.3Added: Additional paragraphs, equation, and tableTable 12-14Replaced Table 12-1412.62Revised 12.62aFor 12.62b and 12.62d, revised minimum insulation resistanceAdded: Note12.63Note 2: Updated reference to 20.8Section II, Part 1313.2Revised frame sizeSection II, Part 18:18.131Figure 18-16: Dimension revised to 5.875Section III, Part 20:20.18.1Revised 20.18.1aFor 20.18.1b and 20.18.1d, revised minimum insulation resistance20.18.2Revised 20.18.2aFor 20.18.2b and 20.18.2d, revised minimum insulation resistanceAdded: NoteSection IV, Part 30:Table 30-1Revised footnote G.1 reference to 12.53 2014 National Electrical Manufacturers Association

This is a preview of "NEMA MG 1-2014". Click here to purchase the full version from the ANSI store.MG 1-2014Summary of Changes, Page 5Changes made for MG 1-2006 Revision 1, published Nov. 20, 2007 (includes MG 12006 Errata) are marked by a blue line to the left of the changed materialNote: Where text has been revised in more than one version, only the most recent is color-codedExample of change made for MG 1-2006 Revision 1ContentsEntire Table of Contents was revised due to added sections and repaginationSection I, Part 1 1.16NEMA PREMIUM EFFICIENCY ELECTRIC MOTORTM ChangedtoDeleted general paragraph, added:1.16.160 Hz1.16.250 HzSection I, Part 22.22.20.22.242.60.1.12.60.1.2FIGURE 2-48B2.61.6TERMINAL MARKINGS FootnotesInduction MachinesDIRECTION OF ROTATIONTerminal Markings Using “T”Terminal Markings in Accordance with IEC 60034-8 Using U, V, WAdded figureSixthRevised textSection I, Part 33.1.8Accessories and ComponentsInserted sentenceSection I, Part 44.9.4Parallelism of Keyseats to Shaft Centerline4.9.5Lateral Displacement of KeyseatsFigure 4-7Corrected specifications4.9.8Shaft Extension Key(s)Table 4-7Corrected specificationsSection II, Part 10 Ratings—AC Motors10.38NAMEPLATE TEMPERATURE RATINGS FOR ALTERNATING-CURRENT SMALL ANDUNIVERSAL MOTORSCorrected reference 12.42.310.40.1Medium Single-Phase and Polyphase Squirrel-Cage MotorsCorrected references in text and footnote 210.42.2Polyphase Wound-Rotor MotorsCorrected references in textSection II, Part 10 Ratings—DC Motors10.66.2Small Motors Except Those Rated 1/20 Horsepower and LessCorrected footnote references 2014 National Electrical Manufacturers Association