NEMA and IEC schematic diagram comparisons - MZ081001EN

1 Comparison of NEMA and IEC schematic diagramsGeneralWith the increasing emphasis on globalization, many industries are now looking to all parts of the world to produce, market, and sell their products. Electrical manufacturers are no exception. Since the electrical standards adopted by various nations may vary, the markings and symbols used to describe electrical control products vary as well. Whether it is a complex control system on a machine tool or a simple across-the-line motor starter, the need to recognize and understand these symbols becomes more important. It is possible that products from all parts of the world are being used in any one purpose of this document is to provide a simple cross reference of common schematic /wiring diagram symbols used throughout various parts of the following tables describe the device and show the symbol by area of MZ081001 ENEffective November 20132 Cross-Reference MZ081001 ENEffective November 2013 Comparison of NEMA and IEC schematic d iagrams eaton breakerMagnetic onlyThermal-magneticCoilBasic contactsNormally closedNormally openTime delay contactsNormally closed, time closedNormally closed, time openNormally open, time closedNormally open, time openDisconnect switch Non-fusedFusedFuse3 Cross-Reference MZ081001 ENEffective November 2013 Comparison of NEMA and IEC schematic d iagrams eaton (ground)

2 Induction motorSingle-phaseThree-phaseIndicating lightsStandardInsert color code inside symbolInsert color code next to symbolPush-to-testInsert color code inside symbolMetersInsert function code inside symbolInsert function code next to symbolOverload relaysThermal elementMagnetic elementPushbuttonsIlluminatedMomentary ( )Momentary ( )Mushroom head ( )Mushroom head ( )Resistor4 Cross-Reference MZ081001 ENEffective November 2013 Comparison of NEMA and IEC schematic d iagrams eaton ( )Float ( )Flow ( )Flow ( )Foot ( )Foot ( )Limit ( )Limit ( )Selector switchTwo-positionThree-position5 Cross-Reference MZ081001 ENEffective November 2013 Comparison of NEMA and IEC schematic d iagrams eaton ( )Pressure ( )Temperature ( )Temperature ( )TransformerCurrentVoltage6 Cross-Reference MZ081001 ENEffective November 2013 Comparison of NEMA and IEC schematic d iagrams eaton schematic Diagrams: Across the Line Non-Reversing Starters with Start Stop PushbuttonsPower circuitControl circuitCommon schematic Diagrams: Across the Line Non-Reversing Starters with Hand Off Auto Selector SwitchPower circuit starterControl circuit starter7 Cross-Reference MZ081001 ENEffective November 2013 Comparison of NEMA and IEC schematic d iagrams eaton schematic Diagrams: Across the Line Reversing Starters with Forward Reverse Stop PushbuttonsPower circuit reversing starterControl circuit reversing starterCommon schematic Diagrams: Combination Starter with Fused Disconnect Switch and Start Stop PushbuttonsPower circuitEaton1000 eaton BoulevardCleveland, OH 44122 United 2013 EatonAll Rights ReservedPrinted in USAP ublication No.

3 MZ081001EN / Z14526 November 2013 eaton is a registered other trademarks are property of their respective of NEMA and IEC schematic d iagrams Cross-Reference MZ081001 ENEffective November 2013 DescriptionneMaTIeCCommon schematic Diagrams: Combination Starter with Fused Disconnect Switch and Start Stop PushbuttonsControl circuitCommon schematic Diagrams: Manual StarterPower circuit