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calculate rated current

Discussion in 'Electrical Engineering' started by blaze, Nov 5, 2009.

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  1. blaze

    blaze Guest

    hello, i hope somene here can help me. let say i want to calculate max
    current through brass terminal block like this
    one:http://www.cableaccs.com/image/brass_earth_terminals_accs-1.jpg

    I understand that brass conductivity is 30% of coppers. But this profile
    hace wholes where wires come etc. How can u calculate what would the be
    the rated current?
     
  2. Tim Perry

    Tim Perry Guest

    I suspect there are too many variable to come up with an accurate
    calculation. For instance, is the block mounted to a chassis which will heat
    sink it or not? AC or DC? Determining contact resistance will be a
    problem.

    If it was me I would just assume that I max was approximately equal to the I
    max of any one wire that will fit into it.
     
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