Motor testing dead short with Fluke 1507

[Isaiah]

What would cause a 460v 3 ph induction motor to register dead short other than motor insulation failure? Motor is new


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[SceneryDriver]

Are you measuring phase-to-phase or phase-to-frame?


SceneryDriver

 

[Isaiah]

Are you measuring phase-to-phase or phase-to-frame?


SceneryDriver

This is measuring to frame


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[zbang]

Internal insulation failure, a foreign object (e.g. nail through the windings), or one of the leads touching the junction box.