Three phase motor min.

[gilb]

Is there a min size wire for three phase motors.Can't find it in book, but thought it was 14ga.This is industrial fixed machines.The wires do run in gator track,not more than 30ft.

 

[bphgravity]

Re: Three phase motor min.

You are a little light on details with your question.

Generally speaking, 310.5 does state a minimum size of #14 copper is permitted, however there are several exceptions including one for motors.

This exception takes you to 430.22(F) and 430.145(B) and allows a minimum of #18 provided you meet the requirements of these sections.