Its normal to blow that fuses, 30 amps is a lot, they should have installed limit switches on the jack but they would have been more expensive, so learn the power jack leg limit ;-) and you wont have any problem
If this fuse is an issue change it to a 30amp automotive circuit breaker with auto reset problem solved for good.
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2015 F350 SRW 6.7 LB 4X4 Crew
2017 Durango G353KRT
2006 F350SD 6.0 LB Crew
2000 F250SD SRW 7.3 LB Extended Cab Air Bags
2002 Western Star 4900EX 500 Detroit 13sp.
2014 Eagle 30.5BHLT (sold)
What if you were to install a paint mark on the raising/lowering post to indicate when its good to stop, therefore preventing you from bottoming out and causing the fuse to blow?