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Thread: cable sizes

  1. 17-Mar-11, 05:52 PM #1
    bergie
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    cable sizes

    anybody know where to get tables for working out cable ratings.
    i have to quote on a 850 amp supply. it is in a trench most of the way and 52m long.
    i normally have to phone aberdare in joburg. the technical guy worked it out to 3x 240mm 4 core armoured cables.seems a bit of an overkill.would work out to over R 160 000 just for cable.
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  2. 17-Mar-11, 07:42 PM #2
    murdock
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    if it is underground in a trench i also get 3 x 240mm

    i am sure you know this already...but just watch the fault levels when selecting equipment and cables for that matter...

    i did a project last year and was advised by everyone to use parallel cables but due to the fault level calculated at the 200 kw motor we had to use 1 x 185.
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  4. 20-Mar-11, 08:50 PM #3
    mikilianis
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    The fault levels do you mean p.s.c. or am I on the wrong path
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