For Most 12 Lead Motors

If used on a standard across the line starter, soft start or variable frequency drive, these motors should be wired in the delta (RUN) connection for either high voltage (480V) or low voltage (240V). The only time you should use the wye connection is a wye-delta starter. The final connection of the motor is ultimately the responsibility of the installing electrician. If he has any questions, he should contact his nearest motor specialist prior to energization.

NEMA Standard Diagram for 12 Lead Motors

VOLTAGE CONN. L1 L2 L3 JOIN HIGH WYE 1 2 3 4&7. 5&8, 6&9, 10&11&12 DELTA 1, 12 2,10 3,11 4&7. 5&8, 6&9 LOW WYE 1,7 2,8 3,9 4&5&6,10&11&12 DELTA 1,6,7,12 2,4,8,10 3,5,9,11 ---
NEMA Standard Diagram for 6 Lead Motors SINGLE VOLTAGE EXTERNAL Y-CONNECTION L1 L2 L3 JOIN 1 2 3 4&5&6
SINGLE VOLTAGE EXTERNAL DELTA-CONNECTION L1 L2 L3 JOIN 1,6 2,4 3,5 4&5&6
SINGLE AND DUAL VOLTAGE STAR-DELTA CONNECTIONS SINGLE VOLTAGE Y-CONNECTED START DELTA CONNECTED RUN DUAL VOLTAGE Y-DELTA-CONNECTED (VOLTAGE RATIO 1.732 to 1) CONN. L1 L2 L3 JOIN Y START OR HIGH VOLTAGE 1 2 3 4&5&6 DELTA RUN OR LOW VOLTAGE 1, 6 2,4 3,5 --- ---
NEMA Standard Diagram for 9 Lead Motors DUALVOLTAGE Y-CONNECTED VOLTAGE L1 L2 L3 JOIN LOW 1,7 2,8 3,9 4&5&6 HIGH 1,6 2,4 3,5 --- ---
DUALVOLTAGE DELTA-CONNECTED VOLTAGE L1 L2 L3 JOIN LOW 1,6,7 2,4,8 3,5,9 --- --- HIGH 1 2 3 4&7. 5&8, 6&9