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How to calculate cable and cb/fuse sizes for motors

Farmboy
I haven't had to calculate cable and cb/fuse size(s) for single and 3 phase electric motors for some time now, but would like to do so as a matter of interest, so is there a contemporary reputable resource I can use that sets out how to do so (I could google/youtube it but don't know about their repute/accuracy)?


Thanks


F
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  • Former Community Member
    0 Former Community Member

    Johnboy6083:

    A rule of Thumb is to size the cable for 1.4 x the running current. This allows for the increased volt drop during starting.




     

    and it gives you a useful "thermal reserve" in a cable subjected to multiple or frequent starting actions


    Regards


    OMS
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  • Former Community Member
    0 Former Community Member

    Johnboy6083:

    A rule of Thumb is to size the cable for 1.4 x the running current. This allows for the increased volt drop during starting.




     

    and it gives you a useful "thermal reserve" in a cable subjected to multiple or frequent starting actions


    Regards


    OMS
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