Recent content by Aaron the Spar

  1. A

    125A D Type MCB keeps tripping on a heater element circ

    72A on phase 1 and 3 and 82A on phase 2, there are 21 elements on the circuit totaling 60kw. This is all correct, we are now getting excessive heat on the 35mm cables.
  2. A

    125A D Type MCB keeps tripping on a heater element circ

    I changed 3 x 125A fuses for 3 x 125A D type MCBs (ABB). They held for a day and then two started tripping, we didn't have any spare 125A, so we fitted 100A C type and the issue has disappeared, can anyone shed any light on this for me please?
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