Hi all,
I have recently visited a site where the previous contractor has, for reasons best known to themselves, installed single cores glanded through thick steel* plate with no slit and with separate phases passing through different rungs of a cable ladder. It's obviously not a good thing, and there are plenty of other issues so the cables are to be reinstalled anyway but for future reference I wondered if anyone might be able to help me quantify what the heating effect might be. Particularly in the ladder case I suspect the aperture / window size is a factor.
(* Yes checked with a magnet)
For scale, these are transformer tails with multiple cores per phase.
Input appreciated.
Jam
PS - This is my first post over here but I have occasionally posted under a different alias on the old forum
