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Which wire is for grounding on Berger Lahr 3 phase stepping motors of the LNA or LWA versions?

The Berger Lahr LNA and LWA versions do not have a ground wire.
Grounding of the LNA version motor in achieved via the front mounting flange only.
All six of the wires that exit the motor are for the motor phases.
See the attached image file for the correct wiring of the phase wires.

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