3 phase +N single core, insulated, aluminium conductors (2 sets in parallel) pass through an aluminium plate (conductors are approx 3" apart, 2 rows of 4 conductors). Can/will eddie currents be produced in the plate? There's arguments it will, because that's how the old mechanical electricity meters work (current and voltage coils influencing an aluminium disc), and anecdotal tales of aluminium bars shooting out of energised coils, compared to others saying no, because aluminium is non-ferrous?
I too believe that you're OK putting single core cables through separate holes in aluminium. Yes you can induce some current in aluminium - as you can in other non-ferrous metals such as copper (in say the windings of a transformer) - but the effect is much smaller than with steel - so small that the effect can be neglected.
Even with steel, you occasionally see meter tails on 100A supplies being (erroneously) taken through separate holes in steel DBs and the like without any obvious problem - so if the effect with a non-ferrous enclosure is even smaller, it's not really going to be a practical problem at all.
I too believe that you're OK putting single core cables through separate holes in aluminium. Yes you can induce some current in aluminium - as you can in other non-ferrous metals such as copper (in say the windings of a transformer) - but the effect is much smaller than with steel - so small that the effect can be neglected.
Even with steel, you occasionally see meter tails on 100A supplies being (erroneously) taken through separate holes in steel DBs and the like without any obvious problem - so if the effect with a non-ferrous enclosure is even smaller, it's not really going to be a practical problem at all.
