I don't use Class-T's after I broke a couple (not hard to do). My system at the moment can dump 1200 Amps but in a short condition that can be 5x that... That is a serious ZOT and also why my powerhouse floor is 3cm thick rubber LOL... This ass does not get grounded hehehe... 1 lesson learned LONG ago and never repeated.
MRBF, Mega & Class-T's fuses will all catch it but at different points. The only fuses I use are for the battery packs directly, everything else is Polarized DC Breakers (except the master 250A breaker).
Photo of my MRBF's attached to Pike Industries Busbars with full proper covers. Also all batt terminals have covers as does everything else that is exposed and a possible contact source.
View attachment 179563The upper busbars is offset by 3/4"/19mm to allow the MRBF brackets to clear while allowing the cables to be "together" to reduce EMI.
I'm in a final reconfig mode now. All my battery packs are being reinstalled into new Steel cases which have their own DC Breakers but the existing MRBF's will remain as I am one to "play safe".