Yeah, you’re right, they do have 400 amp fuses, but it’s a 600 amp disconnect, the first time I went over there, they had fluctuating/inconsistent voltages on all three phases, it ended up being the line side neutral was overly corroded. I cut back on the wire and restripped it, then moved it to the parallel lug next to it and the voltage went back to normal. The inside of the disconnect is dry, which is weird. I don’t know where the moisture was coming from, the disconnect definitely needs to be replaced.