Soft starter cable sizing thump rule 2

[Alms88]

What is the simple thump rule to calculate cable size for DOL starter and soft starters

Motor is 315Kw, 568 FLA, LRa= 3000amps

Soft starter will be voltage ramp from 65% to 100%
10 seconds

Thanks

 

[waross]

125% of motor full load running current.
Or the appropriate table in the NEC where the ampacity is dictated by motor HP.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[Alms88]

thank you very much

 

[jraef]

There is no change in cable sizing rules based on using a soft starter or any other form of reduced voltage start method.


" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden

 

[Alms88]

Thank you