So we put together a pair of distros that convert 30amp 3-phase to 3x 20amp circuits in order to power a set of Leprecon dimming packs. The distros aren't complicated: it's basically just a sub-panel with three Square D breakers in it. The problem is, the system keeps blowing the breakers at random intervals. Sometimes weeks will pass with no issues and then they pop. Amp-clamp tests indicate the legs are only drawing about 17.2amps per. The breakers never pop on a cold bump-up, but usually blow a few hours later. We installed a cooling fan on both distros to no avail. Cable runs to the dimmers are 14/3 and the supply tails are 10/5
What else could be setting these breakers off, aside from them being from a faulty batch?
What else could be setting these breakers off, aside from them being from a faulty batch?