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PDQ Electric Corp

NJ, PA, DE, MD, NY, CT, DC, MA, RI

 

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AC-DC Motor Wiring

Electric Motor Wire Connections
 
 Single Phase Connections:

Single Voltage:

 Rotation

L1

L2
 CCW  1,8   4,5 
 CW  1,5  4,8

Dual Voltage: (Main Winding Only)

Voltage Rotation

L1

L2

 Join 
 High  CCW

1

4,5

2
   CW

1

4,8

2
 Low  CCW  1,3,8   2,4,5    ----
   CW  1,3,5  2,4,8   ----

Dual Voltage: (Main & Auxiliary Winding)

Voltage Rotation

  L1

  L2

   Join
 High  CCW  1,8 4,5  2&3,6 
   CW  1,5 4,8  2&3,6
 Low  CCW  1,3,6,8  2,4,5,7   ------
   CW  1,3,5,7 2,4,6,8   ------

Single Phase Terminal Markings Identified By Color: (NEMA Standards)
 1-Blue 5-Black P1-No color assigned
 2-White 6-No color assigned P2-Brown 
 3-Orange 7-No color assigned 
 4-Yellow 8-Red  

 
Electric Motor Wire Connections
 
 Three Phase Connections:

Part Winding Start:

6 Leads  NEMA Nomenclature: WYE or Delta Connected

   T1  T2  T3 T7   T8  T9  
Motor Leads   1   2   3  7   8   9

9 Leads  NEMA Nomenclature: WYE Connected (low voltage only)

   T1   T2   T3   T7   T8   T9   Together 
Motor Leads   1   2   3   7   8   9  4&5

12 Leads   NEMA & IEC Nomenclature: Single Voltage or Low Voltage of Dual-Voltage Motors

 

T1

T2

T3

T7 

T8 

 T9  
 NEMA  1,6   2,4   3,5   7,12   8,10   9,11 
  IEC

1

 2

 3

7

8

9
 

 Three Phase Motors-Single Speed

 Nema Nomenclature--6 Leads:

Single Voltage--External WYE Connection

 L1 

L2

L3

Join

1

  2

 3

4

Single Voltage--External Delta Connection

L1

 L2

L3

1,6

2,4

3,5

Single Voltage WYE-Delta Connections

Operating mode

  Connection   L1  L2  L3  Join 
  Start   WYE

 1

2

3

4
  Run   Delta

 1,6

 2,4

 3,5

----

Dual Voltage WYE-Delta Connections

  Voltage  Connection 

 L1

L2

L3

  Join 
  High   WYE

 1

2

3

4
  Low   Delta

 1,6

2,4

 3,5 

----

 Nema Nomenclature--9 Leads:
 
Dual Voltage WYE-Connected
 

Voltage

L1

L2

L3

  Join
 High

1

2

3

  4&7, 5&8, 6
 Low

1,7

2,8

3,9

  4

Dual Voltage Delta-Connected

Voltage

L1

L2

L3

Join
 High

1

2

3

  4&7, 5&8, 6
 Low

1,6,7

2,4,8

 3,5,9

--------

NEMA Nomenclature--12 Leads:

Dual Voltage--External WYE Connection

Voltage

 L1

L2

L3

Join

 High

 1

 2

3

  4&7, 5&8, 6&9, 10
 Low

1,7

2,8

3,9

  4&5&6, 10

    Dual Voltage
  WYE-Connected Start
  Delta-Connected Run

 Voltage  Connection

L1

L2

L3

Join
 High  WYE

1

2

3

  4&7, 5&8, 6&9, 10
   Delta

1,12

2,10

3,11

  4&7, 5&8, 6
 Low  WYE

1,7

2,8

3,9

  4&5&6, 10
   Delta  1,6,7,12   2,4,8,10 

 3,5,9,11 

--------

 IEC Nomenclature--6 & 12 Leads:

 
Single Voltage WYE-Delta Connections
 

 oper- mode 

 Connection 

L1

 L2

L3

Join
 Start  WYE

 U1

V1

W1

  U2&V2&W2 
 Run  Delta  U1,W2   V1,U2   W1,V2 

--------

Dual Voltage WYE-Delta Connections

Volt

 Connection 

L1

L2

L3

Join
 High 

 WYE

U 1

V1

W1

 U2&V2&W2 
 Low  Delta  U1,W2   V1,U2   W1,V2 

--------

    Dual Voltage WYE-Connected Start
  Delta-Connected Run

Volt

 Connection 

L1

L2

L3

Join
 High   WYE   U 1  V1  W1  U2&U5,V2&V5,W2&W5, U6 
   Delta  U1,W6   V1,U6   W1,V6  U2&U5,V2&V5,W2
 Low  WYE  U1,U5  V1,V5  W1,W5   U2&V2&W2,U6
   Delta  U1,U5,
W2,W6		  V1,V5
U2,U6		  W1,W5
V2,V6

--------
 
 NEMA Nomenclature--6 Leads:
 
Constant Torque Connection (Low-speed HP is half of high-speed HP)
 

 Speed 

 L1 

 L2 

 L3 

  

Typical
 Connection 
 High

 6

 4

5

1

  2 WYE
 Low

 1

 2

3

4-5-6 Open

  1 Delta

      Variable Torque Connection  (Low-speed HP is 1/4 of high-speed HP)

Speed

 L1 

 L2 

 L3 

  

Typical
 Connection 
 High

6

4

5

1

  2 WYE
 Low

 1

2

 3

  4-5-6 Open  1 WYE

Constant Horsepower Connection (HP is the same at both speeds)

Speed

  L1   L2   L3   

Typical
 Connection 

 High

6

4

5

  1-2-3 Open  1 Delta

 Low

1

2

3

  4-Join  2 WYE

IEC Nomenclature--6 Leads:

Constant Torque Connection

Speed

  L1  L2  L3  

Typical
 Connection 
 High 2W 2U 2V 1U--JOIN  2 WYE
 Low 1U 1V 1W 2U-2V-2W OPEN  1 Delta

Variable Torque Connection

Speed

L1

 L2

L3

  

Typical 
 Connection 
 High

 2W 

 2U 

2V

  1U&1V--JOIN  2 WYE
 Low

1U

1V

 1W 

  2U-2V-2W  OPEN  1 WYE
(877) 737-4349 (Toll Free)  
(877) PDQ-4-FIX (Toll Free) 
(856) 625-6969 (Text Messaging) 
PDQ ia an Acronym for "Pretty Damn Quick"

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