How to calculate breaker and cable size for three duty motors wye delta

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mustafa

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K.S.A
How to calculate breaker and cable size feeding three duty submersible motors for lift station with (Wye delta starting method)? based on NEC
 

Smart $

Esteemed Member
Location
Ohio
How to calculate breaker and cable size feeding three duty submersible motors for lift station with (Wye delta starting method)? based on NEC
Is the cable supplying all three motors or one cable per motor?

I've never seen a three motor wye-start delta-run configuration or even contemplated one... nor do I want to.

Specific Code sections:
430.7(B)(2)
430.22(C)
430.32(A)(1)
 

mustafa

Member
Location
K.S.A
Is the cable supplying all three motors or one cable per motor?

I've never seen a three motor wye-start delta-run configuration or even contemplated one... nor do I want to.

Specific Code sections:
430.7(B)(2)
430.22(C)
430.32(A)(1)


the cable supplying one control panel which is supplying the three group of motors and what about the breaker sizing as well
 
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Smart $

Esteemed Member
Location
Ohio
the cable supplying one control panel which is supplying the three group of motors and what about the breaker sizing as well
If the control panel has short-circuit and ground-fault protection for the motors, refer to 430.24, 430.25, 430.26 and 430 Part V for feeder requirements.
 
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