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Power & Energy
Forum Can i connect  different size of M.V cables in parallel to supply the same load ?
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  • Replies 5 replies
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Can i connect  different size of M.V cables in parallel to supply the same load ?

ibrahem.radad
ibrahem.radad over 7 years ago

Can i connect  different size of M.V cables in parallel to supply the same load ?

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Top Replies

  • rachaelp
    rachaelp over 7 years ago in reply to ibrahem.radad +4
    I think given the voltage and current in question the biggest issue is safety in the event of a failure and ensuring nothing caught fire. In the case of adding an extra 3x70mm2 cable in parallel with the…
  • ibrahem.radad
    ibrahem.radad over 7 years ago in reply to jw0752 +2
    thank you for your replay ,but for more clarification i have a load operated with medium voltage (11KV) supply take about 350A ,for a new project the load will increase into 450A the old cables were two…
  • jw0752
    jw0752 over 7 years ago +1
    Hi Ibrahem, I do not know what exactly an M.V cable is. When you say different size I am guessing you mean different gauge wire. Each gauge (size) and metal composition of wire will have its own resistance…
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  • station240
    station240 over 7 years ago

    Given the name, I seriously doubt he is in the US in the first place, so no idea why people are blindly quoting US and EU laws.

     

    Is it not an option to run the extra 100A load off it's own (new) cable, rather than having 3 cables in parallel ?

    With a new breaker fitted to the supply of the new cable as well.

     

    If one cable fails, the other two will overheat and possibly fail in the short term.

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  • station240
    station240 over 7 years ago

    Given the name, I seriously doubt he is in the US in the first place, so no idea why people are blindly quoting US and EU laws.

     

    Is it not an option to run the extra 100A load off it's own (new) cable, rather than having 3 cables in parallel ?

    With a new breaker fitted to the supply of the new cable as well.

     

    If one cable fails, the other two will overheat and possibly fail in the short term.

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