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Thread: Derating

  1. #1
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    Derating

    Hello all

    This is my first post so I shall add a bit about me.

    I am a student /apprentice currently working and learning with a company in Randburg. Absolutely loving it. A medium to late career change after Covid initial lockdown when I relaized running the family print business was just not cutting my mustard anymore.
    I am also currently registered to write my P1 and P2 in April.

    Now to my question.

    We are having a sort of chat about running a new 3phase 4 wire cable vs. Joining it. (Basically the two 3phase sockets being moved.)
    I would like to find out if there is a derating factor of sorts that can be used for when the cable is ferruled and joined in a junction box ?
    Each cable run is approx 60meters.

    Many thanks !
    Dyl

    Sent from my SM-N960F using Tapatalk

  2. #2
    Diamond Member AndyD's Avatar
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    There are no derating factors to be applied just because a cable is jointed. If the wires are connected with the correct sized ferrules using a decent crimper the connection should result in no increase in end to end cable resistance.
    _______________________________________________

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  3. #3
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    Quote Originally Posted by AndyD View Post
    There are no derating factors to be applied just because a cable is jointed. If the wires are connected with the correct sized ferrules using a decent crimper the connection should result in no increase in end to end cable resistance.
    Thank you AndyD ! Really appreciate it


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