Just out of curiosity I lifted our camper and read the battery monitor. 60 amps dc to start and settled down to 55 amps after a second to lift the entire camper all jacks working together. Those are rieco titan jacks and the camper is about 5000 pounds as it sits in the driveway. The camper has (2) 30 amp fuses for each jack, one for up and the other for down so it looks like we are about half the fuse rating for actual amperage however I suspect that the fronts are using a lot more of that 55 amps than the rear and we are not at the rated max for the jacks of 2500 pounds each so I'm sure that's what they are fused for.