Fuses and Wattloss on T Class MEGA EF3 and DC Breakers

[HRTKD (Jim Egan)]

I may a bit of a purist but for me, a Class T fuse immediately downstream of the battery is the way to go. The AIC is the main reason. After that, it’s whatever works for that position. I am using MRBF fuses for select circuits, like low amperage 48 volt loads (with MRBF fuses rated for that voltage). The MRBF is more convenient than other fuses because I can (easily) bolt it right to a stud on a busbar. Most other fuses would require a cable from the busbar to the fuse holder, which introduces more resistance and failure points.